It's Time to Confront Climate Extremism

Jack Hays · Feb 10, 2020

Professor Ross McKitrick is sounding the alarm. Climate extremism ascended to new influence in 2019. Adherents of sound science will have to take up the fight in earnest if rationality is to prevail in 2020.

We must fight climate extremists before they upend society

Start learning the deep details of the science and economics instead of letting extremists dictate what you’re allowed to think or say. Guest opinion by Ross Mckitrick Last year was the year the climate issue took a sharp turn towards extremism. Let’s hope 2020 is the year sanity makes a comeback. There have long been three…

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Last year was the year the climate issue took a sharp turn towards extremism. Let’s hope 2020 is the year sanity makes a comeback.

There have long been three groups occupying the climate issue. To avoid pejoratives, I will call them A, B and C.

The A group are the doubters. They don’t believe greenhouse gases (GHGs) do much harm and they don’t support expensive climate-policy interventions. If we must choose between climate policy and the continued use of inexpensive fossil energy, they readily choose the latter.

The C group think the opposite; they fear a climate catastrophe, they foresee a crisis and they want urgent action, regardless of cost, to stop it.

The B group are in the middle. They believe, or say they believe, that GHG emissions are a problem and must be reduced. They are vague on the question of how much and when, but in general they try to balance environmental goals with the provision of inexpensive energy and robust economic growth.

The leaders in business, government and the bureaucracy tend to be in this group. They have spent the last 20 years verbally acknowledging the concerns of group C and even borrowing their slogans, while quietly letting the A agenda mostly win out, which the underlying economics pretty much necessitates.

This uneasy compromise fell apart last year. . . .

Climate and energy policy has fallen into the hands of a worldwide movement that openly declares its extremism. The would-be moderates on this issue have pretended for 20 years they could keep the status quo without having to fight for it. Those days are over.

swing_voter · Feb 10, 2020

AMERICAN SCIENTIFIC SOCIETIES

American Association for the Advancement of Science
"Based on well-established evidence, about 97% of climate scientists have concluded that human-caused climate change is happening." (2014)3

American Chemical Society
"The Earth’s climate is changing in response to increasing concentrations of greenhouse gases (GHGs) and particulate matter in the atmosphere, largely as the result of human activities." (2016-2019)4

American Geophysical Union
"Based on extensive scientific evidence, it is extremely likely that human activities, especially emissions of greenhouse gases, are the dominant cause of the observed warming since the mid-20th century. There is no alterative explanation supported by convincing evidence." (2019)5

American Medical Association
"Our AMA ... supports the findings of the Intergovernmental Panel on Climate Change’s fourth assessment report and concurs with the scientific consensus that the Earth is undergoing adverse global climate change and that anthropogenic contributions are significant." (2019)6

American Meteorological Society
"Research has found a human influence on the climate of the past several decades ... The IPCC (2013), USGCRP (2017), and USGCRP (2018) indicate that it is extremely likely that human influence has been the dominant cause of the observed warming since the mid-twentieth century." (2019)7

American Physical Society
"Earth's changing climate is a critical issue and poses the risk of significant environmental, social and economic disruptions around the globe. While natural sources of climate variability are significant, multiple lines of evidence indicate that human influences have had an increasingly dominant effect on global climate warming observed since the mid-twentieth century." (2015)8

The Geological Society of America
"The Geological Society of America (GSA) concurs with assessments by the National Academies of Science (2005), the National Research Council (2011), the Intergovernmental Panel on Climate Change (IPCC, 2013) and the U.S. Global Change Research Program (Melillo et al., 2014) that global climate has warmed in response to increasing concentrations of carbon dioxide (CO2) and other greenhouse gases ... Human activities (mainly greenhouse-gas emissions) are the dominant cause of the rapid warming since the middle 1900s (IPCC, 2013)." (2015)9

SCIENCE ACADEMIES

International Academies: Joint Statement
"Climate change is real. There will always be uncertainty in understanding a system as complex as the world’s climate. However there is now strong evidence that significant global warming is occurring. The evidence comes from direct measurements of rising surface air temperatures and subsurface ocean temperatures and from phenomena such as increases in average global sea levels, retreating glaciers, and changes to many physical and biological systems. It is likely that most of the warming in recent decades can be attributed to human activities (IPCC 2001)." (2005, 11 international science academies)10

U.S. National Academy of Sciences
"Scientists have known for some time, from multiple lines of evidence, that humans are changing Earth’s climate, primarily through greenhouse gas emissions."11

U.S. GOVERNMENT AGENCIES

U.S. Global Change Research Program
"Earth’s climate is now changing faster than at any point in the history of modern civilization, primarily as a result of human activities." (2018, 13 U.S. government departments and agencies)12

INTERGOVERNMENTAL BODIES

Intergovernmental Panel on Climate Change
“Warming of the climate system is unequivocal, and since the 1950s, many of the observed changes are unprecedented over decades to millennia. The atmosphere and ocean have warmed, the amounts of snow and ice have diminished, and sea level has risen.”13

“Human influence on the climate system is clear, and recent anthropogenic emissions of greenhouse gases are the highest in history. Recent climate changes have had widespread impacts on human and natural systems.”14

ALiberalModerate · Feb 10, 2020

swing_voter said:
AMERICAN SCIENTIFIC SOCIETIES

American Association for the Advancement of Science
"Based on well-established evidence, about 97% of climate scientists have concluded that human-caused climate change is happening." (2014)3

American Chemical Society
"The Earth’s climate is changing in response to increasing concentrations of greenhouse gases (GHGs) and particulate matter in the atmosphere, largely as the result of human activities." (2016-2019)4

American Geophysical Union
"Based on extensive scientific evidence, it is extremely likely that human activities, especially emissions of greenhouse gases, are the dominant cause of the observed warming since the mid-20th century. There is no alterative explanation supported by convincing evidence." (2019)5

American Medical Association
"Our AMA ... supports the findings of the Intergovernmental Panel on Climate Change’s fourth assessment report and concurs with the scientific consensus that the Earth is undergoing adverse global climate change and that anthropogenic contributions are significant." (2019)6

American Meteorological Society
"Research has found a human influence on the climate of the past several decades ... The IPCC (2013), USGCRP (2017), and USGCRP (2018) indicate that it is extremely likely that human influence has been the dominant cause of the observed warming since the mid-twentieth century." (2019)7

American Physical Society
"Earth's changing climate is a critical issue and poses the risk of significant environmental, social and economic disruptions around the globe. While natural sources of climate variability are significant, multiple lines of evidence indicate that human influences have had an increasingly dominant effect on global climate warming observed since the mid-twentieth century." (2015)8

The Geological Society of America
"The Geological Society of America (GSA) concurs with assessments by the National Academies of Science (2005), the National Research Council (2011), the Intergovernmental Panel on Climate Change (IPCC, 2013) and the U.S. Global Change Research Program (Melillo et al., 2014) that global climate has warmed in response to increasing concentrations of carbon dioxide (CO2) and other greenhouse gases ... Human activities (mainly greenhouse-gas emissions) are the dominant cause of the rapid warming since the middle 1900s (IPCC, 2013)." (2015)9

SCIENCE ACADEMIES

International Academies: Joint Statement
"Climate change is real. There will always be uncertainty in understanding a system as complex as the world’s climate. However there is now strong evidence that significant global warming is occurring. The evidence comes from direct measurements of rising surface air temperatures and subsurface ocean temperatures and from phenomena such as increases in average global sea levels, retreating glaciers, and changes to many physical and biological systems. It is likely that most of the warming in recent decades can be attributed to human activities (IPCC 2001)." (2005, 11 international science academies)10

U.S. National Academy of Sciences
"Scientists have known for some time, from multiple lines of evidence, that humans are changing Earth’s climate, primarily through greenhouse gas emissions."11

U.S. GOVERNMENT AGENCIES

U.S. Global Change Research Program
"Earth’s climate is now changing faster than at any point in the history of modern civilization, primarily as a result of human activities." (2018, 13 U.S. government departments and agencies)12

INTERGOVERNMENTAL BODIES

Intergovernmental Panel on Climate Change
“Warming of the climate system is unequivocal, and since the 1950s, many of the observed changes are unprecedented over decades to millennia. The atmosphere and ocean have warmed, the amounts of snow and ice have diminished, and sea level has risen.”13

“Human influence on the climate system is clear, and recent anthropogenic emissions of greenhouse gases are the highest in history. Recent climate changes have had widespread impacts on human and natural systems.”14

Yeah, yeah, yeah..... but Jack Hay's reads an internet blog that tells him different.

Jack Hays · Feb 10, 2020

swing_voter said:
AMERICAN SCIENTIFIC SOCIETIES

American Association for the Advancement of Science
"Based on well-established evidence, about 97% of climate scientists have concluded that human-caused climate change is happening." (2014)3

American Chemical Society
"The Earth’s climate is changing in response to increasing concentrations of greenhouse gases (GHGs) and particulate matter in the atmosphere, largely as the result of human activities." (2016-2019)4

American Geophysical Union
"Based on extensive scientific evidence, it is extremely likely that human activities, especially emissions of greenhouse gases, are the dominant cause of the observed warming since the mid-20th century. There is no alterative explanation supported by convincing evidence." (2019)5

American Medical Association
"Our AMA ... supports the findings of the Intergovernmental Panel on Climate Change’s fourth assessment report and concurs with the scientific consensus that the Earth is undergoing adverse global climate change and that anthropogenic contributions are significant." (2019)6

American Meteorological Society
"Research has found a human influence on the climate of the past several decades ... The IPCC (2013), USGCRP (2017), and USGCRP (2018) indicate that it is extremely likely that human influence has been the dominant cause of the observed warming since the mid-twentieth century." (2019)7

American Physical Society
"Earth's changing climate is a critical issue and poses the risk of significant environmental, social and economic disruptions around the globe. While natural sources of climate variability are significant, multiple lines of evidence indicate that human influences have had an increasingly dominant effect on global climate warming observed since the mid-twentieth century." (2015)8

The Geological Society of America
"The Geological Society of America (GSA) concurs with assessments by the National Academies of Science (2005), the National Research Council (2011), the Intergovernmental Panel on Climate Change (IPCC, 2013) and the U.S. Global Change Research Program (Melillo et al., 2014) that global climate has warmed in response to increasing concentrations of carbon dioxide (CO2) and other greenhouse gases ... Human activities (mainly greenhouse-gas emissions) are the dominant cause of the rapid warming since the middle 1900s (IPCC, 2013)." (2015)9

SCIENCE ACADEMIES

International Academies: Joint Statement
"Climate change is real. There will always be uncertainty in understanding a system as complex as the world’s climate. However there is now strong evidence that significant global warming is occurring. The evidence comes from direct measurements of rising surface air temperatures and subsurface ocean temperatures and from phenomena such as increases in average global sea levels, retreating glaciers, and changes to many physical and biological systems. It is likely that most of the warming in recent decades can be attributed to human activities (IPCC 2001)." (2005, 11 international science academies)10

U.S. National Academy of Sciences
"Scientists have known for some time, from multiple lines of evidence, that humans are changing Earth’s climate, primarily through greenhouse gas emissions."11

U.S. GOVERNMENT AGENCIES

U.S. Global Change Research Program
"Earth’s climate is now changing faster than at any point in the history of modern civilization, primarily as a result of human activities." (2018, 13 U.S. government departments and agencies)12

INTERGOVERNMENTAL BODIES

Intergovernmental Panel on Climate Change
“Warming of the climate system is unequivocal, and since the 1950s, many of the observed changes are unprecedented over decades to millennia. The atmosphere and ocean have warmed, the amounts of snow and ice have diminished, and sea level has risen.”13

“Human influence on the climate system is clear, and recent anthropogenic emissions of greenhouse gases are the highest in history. Recent climate changes have had widespread impacts on human and natural systems.”14

SouthernDemocrat said:
Yeah, yeah, yeah..... but Jack Hay's reads an internet blog that tells him different.

And those societies are the groups most threatened by ascendant extremism.

Sunsettommy · Feb 10, 2020

swing_voter said:
AMERICAN SCIENTIFIC SOCIETIES

American Association for the Advancement of Science
"Based on well-established evidence, about 97% of climate scientists have concluded that human-caused climate change is happening." (2014)3

American Chemical Society
"The Earth’s climate is changing in response to increasing concentrations of greenhouse gases (GHGs) and particulate matter in the atmosphere, largely as the result of human activities." (2016-2019)4

American Geophysical Union
"Based on extensive scientific evidence, it is extremely likely that human activities, especially emissions of greenhouse gases, are the dominant cause of the observed warming since the mid-20th century. There is no alterative explanation supported by convincing evidence." (2019)5

American Medical Association
"Our AMA ... supports the findings of the Intergovernmental Panel on Climate Change’s fourth assessment report and concurs with the scientific consensus that the Earth is undergoing adverse global climate change and that anthropogenic contributions are significant." (2019)6

American Meteorological Society
"Research has found a human influence on the climate of the past several decades ... The IPCC (2013), USGCRP (2017), and USGCRP (2018) indicate that it is extremely likely that human influence has been the dominant cause of the observed warming since the mid-twentieth century." (2019)7

American Physical Society
"Earth's changing climate is a critical issue and poses the risk of significant environmental, social and economic disruptions around the globe. While natural sources of climate variability are significant, multiple lines of evidence indicate that human influences have had an increasingly dominant effect on global climate warming observed since the mid-twentieth century." (2015)8

The Geological Society of America
"The Geological Society of America (GSA) concurs with assessments by the National Academies of Science (2005), the National Research Council (2011), the Intergovernmental Panel on Climate Change (IPCC, 2013) and the U.S. Global Change Research Program (Melillo et al., 2014) that global climate has warmed in response to increasing concentrations of carbon dioxide (CO2) and other greenhouse gases ... Human activities (mainly greenhouse-gas emissions) are the dominant cause of the rapid warming since the middle 1900s (IPCC, 2013)." (2015)9

SCIENCE ACADEMIES

International Academies: Joint Statement
"Climate change is real. There will always be uncertainty in understanding a system as complex as the world’s climate. However there is now strong evidence that significant global warming is occurring. The evidence comes from direct measurements of rising surface air temperatures and subsurface ocean temperatures and from phenomena such as increases in average global sea levels, retreating glaciers, and changes to many physical and biological systems. It is likely that most of the warming in recent decades can be attributed to human activities (IPCC 2001)." (2005, 11 international science academies)10

U.S. National Academy of Sciences
"Scientists have known for some time, from multiple lines of evidence, that humans are changing Earth’s climate, primarily through greenhouse gas emissions."11

U.S. GOVERNMENT AGENCIES

U.S. Global Change Research Program
"Earth’s climate is now changing faster than at any point in the history of modern civilization, primarily as a result of human activities." (2018, 13 U.S. government departments and agencies)12

INTERGOVERNMENTAL BODIES

Intergovernmental Panel on Climate Change
“Warming of the climate system is unequivocal, and since the 1950s, many of the observed changes are unprecedented over decades to millennia. The atmosphere and ocean have warmed, the amounts of snow and ice have diminished, and sea level has risen.”13

“Human influence on the climate system is clear, and recent anthropogenic emissions of greenhouse gases are the highest in history. Recent climate changes have had widespread impacts on human and natural systems.”14

Consensus claims are useless and boring. They have been wrong too many time over the centuries.

When you think this way, you tell us you have nothing but alarmism to offer.

ALiberalModerate · Feb 10, 2020

Jack Hays said:
And those societies are the groups most threatened by ascendant extremism.

Sure, when I think of scientific societies, I of course think of extremism... Everyone knows those folks over the American Association for the Advancement of Science, the National Academy of Science, and the Royal Academy of Sciences are a bunch of lunatics.. You can only trust an internet blog. :roll:

ecofarm · Feb 10, 2020

WUWT spam.

Grand Mal · Feb 10, 2020

Sunsettommy said:
Consensus claims are useless and boring. They have been wrong too many time over the centuries.

When you think this way, you tell us you have nothing but alarmism to offer.

No, what's useless is a President promoting absolutely stupid conspiracy theories like...

Sunsettommy · Feb 10, 2020

Grand Mal said:
No, what's useless is a President promoting absolutely stupid conspiracy theories like...

View attachment 67273539

Your evasion is noted...

My reasonable statement remains unchallenged:

Consensus claims are useless and boring. They have been wrong too many time over the centuries.

When you think this way, you tell us you have nothing but alarmism to offer.

Sunsettommy · Feb 10, 2020

ecofarm said:
WUWT spam.

Your lack of cogent reply is revealing, is it fear of debate?

ecofarm · Feb 10, 2020

Sunsettommy said:
Your lack of cogent reply is revealing, is it fear of debate?

I thought it was kinda clever; could be taken in two ways. I got a chuckle; you get yours.

Sunsettommy · Feb 10, 2020

ecofarm said:
I thought it was kinda clever; could be taken in two ways. I got a chuckle; you get yours.

Your lack of cogent reply is revealing, is it fear of debate?

ecofarm · Feb 10, 2020

Sunsettommy said:
Your lack of cogent reply is revealing, is it fear of debate?

If I wanted to debate WUWT, I'd write to the conspiracy theory blog. Shilling for that blog is not debating.

Grand Mal · Feb 10, 2020

Sunsettommy said:
Your evasion is noted...

My reasonable statement remains unchallenged:

Your reliance on worn-out, inappropriate cliches is noted. You didn't state anything but an opinion. Opinions are like assholes- everyone has one. Over the centuries? Am I to guess that you equate global warming with flat-earth or geocentrism or some other fallacy based solely on limited information?

TomFitz · Feb 10, 2020

What’sUpWithThat is a climate change denial trash blog run by a TV weatherman, and funded by the extremist Heartland Institute (read Exxon Mobil).

Give it up. The marketplace has already decided.

Which is why Tesla is on everyone’s buy list, and Exxon Mobil is on the sell list.

jpn · Feb 10, 2020

Jack Hays said:
Professor Ross McKitrick is sounding the alarm.

Oh good, a really important article about a complex scientific theory written by an...economist...published in a climate denier website run by a guy whose highest academic achievement is a High School diploma.

Should be fascinating...:roll:

jpn · Feb 10, 2020

Jack Hays said:
And those societies are the groups most threatened by ascendant extremism.

Yeah, it's really extreme to believe what your research tells you.

ecofarm · Feb 10, 2020

TomFitz said:
What’sUpWithThat is a climate change denial trash blog run by a TV weatherman, and funded by the extremist Heartland Institute (read Exxon Mobil).

Give it up. The marketplace has already decided.

Which is why Tesla is on everyone’s buy list, and Exxon Mobil is on the sell list.

Mobil still gets OPs every day and massive in-thread spam. It's cited hundreds of times per month, probably more than any source at this website including Fox and CNN.

longview · Feb 10, 2020

swing_voter said:
AMERICAN SCIENTIFIC SOCIETIES

American Association for the Advancement of Science
"Based on well-established evidence, about 97% of climate scientists have concluded that human-caused climate change is happening." (2014)3

American Chemical Society
"The Earth’s climate is changing in response to increasing concentrations of greenhouse gases (GHGs) and particulate matter in the atmosphere, largely as the result of human activities." (2016-2019)4

American Geophysical Union
"Based on extensive scientific evidence, it is extremely likely that human activities, especially emissions of greenhouse gases, are the dominant cause of the observed warming since the mid-20th century. There is no alterative explanation supported by convincing evidence." (2019)5

American Medical Association
"Our AMA ... supports the findings of the Intergovernmental Panel on Climate Change’s fourth assessment report and concurs with the scientific consensus that the Earth is undergoing adverse global climate change and that anthropogenic contributions are significant." (2019)6

American Meteorological Society
"Research has found a human influence on the climate of the past several decades ... The IPCC (2013), USGCRP (2017), and USGCRP (2018) indicate that it is extremely likely that human influence has been the dominant cause of the observed warming since the mid-twentieth century." (2019)7

American Physical Society
"Earth's changing climate is a critical issue and poses the risk of significant environmental, social and economic disruptions around the globe. While natural sources of climate variability are significant, multiple lines of evidence indicate that human influences have had an increasingly dominant effect on global climate warming observed since the mid-twentieth century." (2015)8

The Geological Society of America
"The Geological Society of America (GSA) concurs with assessments by the National Academies of Science (2005), the National Research Council (2011), the Intergovernmental Panel on Climate Change (IPCC, 2013) and the U.S. Global Change Research Program (Melillo et al., 2014) that global climate has warmed in response to increasing concentrations of carbon dioxide (CO2) and other greenhouse gases ... Human activities (mainly greenhouse-gas emissions) are the dominant cause of the rapid warming since the middle 1900s (IPCC, 2013)." (2015)9

SCIENCE ACADEMIES

International Academies: Joint Statement
"Climate change is real. There will always be uncertainty in understanding a system as complex as the world’s climate. However there is now strong evidence that significant global warming is occurring. The evidence comes from direct measurements of rising surface air temperatures and subsurface ocean temperatures and from phenomena such as increases in average global sea levels, retreating glaciers, and changes to many physical and biological systems. It is likely that most of the warming in recent decades can be attributed to human activities (IPCC 2001)." (2005, 11 international science academies)10

U.S. National Academy of Sciences
"Scientists have known for some time, from multiple lines of evidence, that humans are changing Earth’s climate, primarily through greenhouse gas emissions."11

U.S. GOVERNMENT AGENCIES

U.S. Global Change Research Program
"Earth’s climate is now changing faster than at any point in the history of modern civilization, primarily as a result of human activities." (2018, 13 U.S. government departments and agencies)12

INTERGOVERNMENTAL BODIES

Intergovernmental Panel on Climate Change
“Warming of the climate system is unequivocal, and since the 1950s, many of the observed changes are unprecedented over decades to millennia. The atmosphere and ocean have warmed, the amounts of snow and ice have diminished, and sea level has risen.”13

“Human influence on the climate system is clear, and recent anthropogenic emissions of greenhouse gases are the highest in history. Recent climate changes have had widespread impacts on human and natural systems.”14

It might be worth looking at the limits of what the above statements say , and which portions of those statements are subjective!

"human-caused climate change is happening."Yep sure enough, no mention of how much or if it might be a problem.

"Based on extensive scientific evidence, it is extremely likely that human activities, especially emissions of greenhouse gases, are the dominant cause of the observed warming since the mid-20th century. There is no alterative explanation supported by convincing evidence."
We choose to not look at other explanations of causes of warming!

The bottom line is that the statements do not mean much, they simply cover that, Yes CO2 is a greenhouse gas,
and Human activity is likely causing some warming.
Beyond that some of the statements go into some subjective opinions, which are not supported by science.

jpn · Feb 10, 2020

Sunsettommy said:
Consensus claims are useless and boring. They have been wrong too many time over the centuries.
When you think this way, you tell us you have nothing but alarmism to offer.

What's boring are people who are too close-minded to accept what the experts agree on because that would upset their preexisting biases.

It's way more interesting to challenge oneself. Like, for example, "why don't I accept the scientific consensus on this issue? Is it because my own expert analysis differs, and the most likely reason for that difference is because they are all wrong and I'm right? Or is it because I actually have no expertise on this issue at all, and I just don't want to believe in something that would make me cry at night?"

PoS · Feb 10, 2020

jpn said:
What's boring are people who are too close-minded to accept what the experts agree on because that would upset their preexisting biases.

Wrong. Experts dont agree on climate change: Yes, Virginia- Thousands of Scientists Are Skeptical of Climate Change

jpn · Feb 10, 2020

longview said:
The bottom line is that the statements do not mean much, they simply cover that, Yes CO2 is a greenhouse gas,
and Human activity is likely causing some warming.
Beyond that some of the statements go into some subjective opinions, which are not supported by science.

It's hard to believe you're looking at this issue in good faith when you so blithely mischaracterize what the various scientific groups actually say.

International Academies: Joint Statement
"Climate change is real. There will always be uncertainty in understanding a system as complex as the world’s climate. However there is now strong evidence that significant global warming is occurring. The evidence comes from direct measurements of rising surface air temperatures and subsurface ocean temperatures and from phenomena such as increases in average global sea levels, retreating glaciers, and changes to many physical and biological systems. It is likely that most of the warming in recent decades can be attributed to human activities (IPCC 2001)." (2005, 11 international science academies)10

Statement on Climate Change from 18 Scientific Associations
"Observations throughout the world make it clear that climate change is occurring, and rigorous scientific research demonstrates that the greenhouse gases emitted by human activities are the primary driver." (2009)2

jpn · Feb 10, 2020

PoS said:
Wrong. Experts dont agree on climate change: Yes, Virginia- Thousands of Scientists Are Skeptical of Climate Change

Oh, a denier website. If only the deniers spent more time in the lab and less time proselytizing, then...um...well, actually I reckon the result would be the same.

longview · Feb 10, 2020

jpn said:
It's hard to believe you're looking at this issue in good faith when you so blithely mischaracterize what the various scientific groups actually say.

International Academies: Joint Statement
"Climate change is real. There will always be uncertainty in understanding a system as complex as the world’s climate. However there is now strong evidence that significant global warming is occurring. The evidence comes from direct measurements of rising surface air temperatures and subsurface ocean temperatures and from phenomena such as increases in average global sea levels, retreating glaciers, and changes to many physical and biological systems. It is likely that most of the warming in recent decades can be attributed to human activities (IPCC 2001)." (2005, 11 international science academies)10

Statement on Climate Change from 18 Scientific Associations
"Observations throughout the world make it clear that climate change is occurring, and rigorous scientific research demonstrates that the greenhouse gases emitted by human activities are the primary driver." (2009)2

Let's break down your quoted statement!
"Climate change is real. There will always be uncertainty in understanding a system as complex as the world’s climate.

Yes the climate has always changed!

However there is now strong evidence that significant global warming is occurring.

Yes Global warming is occurring, plants unlike people do not lie, and the plant hardiness zones have moved.

The evidence comes from direct measurements of rising surface air temperatures and subsurface ocean temperatures and from phenomena such as increases in average global sea levels, retreating glaciers, and changes to many physical and biological systems.

The evidence is that the Earth is warming, and is not a statement as to the cause of the warming!

It is likely that most of the warming in recent decades can be attributed to human activities (IPCC 2001)."

Lastly they quote the IPCC from 19 years ago saying that , It is likely that most of the warming in recent decades
can be attributed to Human activity!
Notice that in the last sentence they did not single out CO2, they simply stated Human activity.
Human activity can cover almost anything, land use change, heat island effects, even human adjustments of the data sets,
all are human activity.

It is also worth pointing out that they freely interchange terms like climate change and global warming,
and imply that those terms are the same as Anthropogenic climate change and Anthropogenic Global Warming.

Jack Hays · Feb 10, 2020

SouthernDemocrat said:
Sure, when I think of scientific societies, I of course think of extremism... Everyone knows those folks over the American Association for the Advancement of Science, the National Academy of Science, and the Royal Academy of Sciences are a bunch of lunatics.. You can only trust an internet blog. :roll:

Those societies are the "B" group in the OP. The extremists are the "C" group.

It's Time to Confront Climate Extremism

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