Quote from bigdavediode:
Here's a thousand years, perhaps you can show us the warming trend:
<img src="http://upload.wikimedia.org/wikipedia/commons/thumb/b/bb/1000_Year_Temperature_Comparison.png/300px-1000_Year_Temperature_Comparison.png"></img>
Does your "warming trend" require cherry picking a specific timeframe, by any chance? Like, you wouldn't dishonestly try to pick the start from the middle of an ice age or something, would you?
Gah! You would!
Here's a graph of the last two thousand years, perhaps you can show us the warming trend to which you're referring:
<img src="http://upload.wikimedia.org/wikipedia/commons/c/c1/2000_Year_Temperature_Comparison.png"> </img>
There doesn't seem to be one.
Well, maybe it's just an artifact specific to your graph, here's another graph:
<img src="http://upload.wikimedia.org/wikipedia/commons/c/ca/Holocene_Temperature_Variations.png"> </img>
Nope, not there either.
Realclimate is not a left-wing website, nor is it "greenie." In fact, it has some of the top climatologists posting there.
Humans caused the CO2. CO2 is proven to disproportionately absorb IR. QED, humans caused the increase in IR absorption.