Wow!! Finally an answer.
There's just a few problems with it.
1 The sea level is not predicted o rise much. The IPCC's numbers are that a worst case scenario is a 6.4 degree c temperature rise giving a sea level change of 59cm by 2100. The temperature rise has been reduced in half as a worst case so the sea level rise is likely to be a lot close to your ankle than your knee.
2 Different precipitation patterns are more of the "well, change... no actual mechanism.. no actual understanding..." type of thing. When in the past it has been hotter the earth has been wetter, unsurprisingly, and this has caused a much more fertile earth.
One of the biggest reasons that deniers are stuck there is that they look at the numbers for temperature for instance and think, it wouldn't be bad if everyday was 5 degrees warmer. In fact, it might be more comfortable in some places. Or, just a couple of feet of sea level rise. Not bad at all.
Of course like the conservatives they tend to be, they believe that it's only about them.
Hurricane Sandy showed us how vulnerable coastal cities are. The mid West drought is showing us how vulnerable our agriculture industry is. We are already spending billions every year on disaster recovery that is related to AGW and it hasn't even really started yet.
What environmentalism is about is the future. One has to care about the future to even comprehend it. Folks who care only about themselves have very limited horizons. It's not surprising that they are in denial.