No the records show it was hot before oil
...and after oil it got even hotter.
Just because temperature can change without mankind's input doesn't mean mankind is incapable of affecting temperature. That's just plain faulty logic.
I started my participation in this thread objecting to the use of tree-ring data as an accurate temperature proxy. Poor correlation in the earlier part of last century, plus a large deviation in the later part of last century and this century is evident that the mapping from tree-ring data to temperature is inexact. Their solution for the later deviation is completely bogus - it is a statistical technique and does not preserve the original mapping.
Tree-ring data is a fine proxy, in all cases except one set of data: high-northern lattitude readings over the last few decades. In all other regions and all other time periods, it fits fine. Like I said before, no research is ever free of bad data. Especially in a field this complicated, contamination will happen. Depleted ozone is one of several theories to describe this, and I already linked a paper discussing this issue, which I take it you didn't read.
I do think other temperature proxies with decent correlation of mapping exists. I do think we are seeing a warming period these last few decades. I think it is cyclic.
How cyclic? Temperature has steadily increased for a century now. When does the down cycle start and what is the mechanism that causes it? Saying "it's cyclic" without discussing a mechanism is just sticking your head in the sand. I'll rule a few out for you:
1) The sun's long-term trend is a slow, steady increase in output, as is normal for a star. Within that long-term trend is a shorter cycle, an 11-year solar output cycle that is easily measured and accounted for. The sun's output does not account for the current warming, we've seen warming during time periods where solar output decreased. Since it's an 11-year cycle, clearly a 100-year warming trend wouldn't be a result of it.
2) El Nino/La Nina is on an even shorter cycle than the sun. 5-ish years, if I remember right. Also, if the ocean storing more heat was the cause of a century-long warming trend, how come it never did this before? What changed to make the ocean start absorbing more heat than it used to?
3) Continental configuration changes heat storage, as land an ocean absorb and reflect heat differently. The configuration of continents does not appreciably change in a 100-year period.
4) Orbital mechanics do not change on a 100-year cycle. The earth's orbital wobble is believed to be a primary driver in the cycle of ice ages, but this is a cycle that occurs over several thousand years, not 100.
5) Water vapor is not a forcing, it's a feedback. Water vapor contributes the majority of the greenhouse effect, but the amount of water vapor in the atmosphere is determined by and limited by temperature. (Meteorology 101, Dew Point)
So, what mechanism is causing this warming trend?
I do not think it is caused by man's use of petrochemicals. The arguments being made for this are political and the dissenting viewpoint is being actively suppressed.
No they aren't. They're addressed all the time. A paper was released just last month talking about how the author believed CFC's to be the primary driver of temperature change instead of CO2. It's already been addressed by the scientific community. Hell, think up any argument against AGW. Anything you can come up with. I bet it's in this list.
Arguments from Global Warming Skeptics and what the science really says
You have no evidence of active suppression of dissent. One email by one guy does not prove that any action has even been taken, let alone action that somehow globally suppresses all dissent even in the age of the internet.
Here's a simple explanation of some of the empirical evidence:
We can
directly measure the longwave infrared spectrum and how it gets absorbed. This happens with measurements taken on the ground and measurements taken by satellites. In direct correlation to rising CO2 levels, the outgoing level of radiation in the spectrum that CO2 absorbs has been decreasing. This is what the greenhouse effect is, absorption of the longwave infrared radiation that the earth emits back into space. At the same time, the "downward" radiation in this same spectrum has been increasing, as the outgoing radiation that gets absorbed gets re-emitted in all directions.
So, the atmosphere is absorbing and trapping more and more energy as CO2 goes up. We see this same effect in the spectrum covered by other greenhouse gases: water vapor, CFC's, methane, etc, but these have not changed to the degree that CO2 has. That energy that gets absorbed has to go somewhere. It's heating the earth.