I found it here:
http://dotearth.blogs.nytimes.com/2012/07/28/converted-skeptic-humans-driving-recent-warming/
I found it here:
http://dotearth.blogs.nytimes.com/2012/07/28/converted-skeptic-humans-driving-recent-warming/
In that presentation I see effect, not cause. Didn't read the article.
We don't know the primary cause, but it's really global (the Mars polar ice caps are shrinking). It just happens that it's very likely we're making the process faster by releasing into the atmosphere, in a couple of hundred years, most of the carbon dioxyde that took 200 million years to accumulate in the soil as coal and oil.