Global Warming

From CBS News - click here to read more...

This Sunday, "60 Minutes" aired a piece on global warming. The piece, which featured correspondent Scott Pelley, largely took the existence of global warming as a given. But there are those who claim that global warming – and, specifically, the notion that humans are responsible for it – is a myth. I asked Pelley why the voices of the skeptics were not heard in the piece. "There is virtually no disagreement in the scientific community any longer about global warming," he says. "The science that has been done in the last three to five years has been conclusive.

We talked to the chairman of the National Academy of Sciences (NOTE: This word was incorrectly transcribed and has been corrected), Ralph Cicerone. Jim Hansen at NASA, who's considered the world's leading expert in climate change. The people in the story, who are well respected in the field. There's just no longer any credible evidence that suggests that, a, the earth is not warming or, b, that greenhouse gasses are not the cause. What you do see in the data again and again and again is this almost lockstep increase between the levels of CO2 and the rise of temperature in the atmosphere. And the climate models that predicted these things happening 15 years ago have proven to be accurate."