Even if we cut emissions to zero world wide, you still have an increase in the concentration that's occurred over the last 30, forty years. The temperature will still continue to rise as a result of past increases in the c o two concentration. So yatt' one of those tricky problems. It's only one more degree, but it is a doubling,. But it is where it is a worrisome problem.
Economist Robert Pindyck of MIT talks about his book, Climate Future, with EconTalk host Russ Roberts. Pindyck lays out what we know and do not know about climate change. He argues that because of the nature of greenhouse gases, adaptation must be part of the policy response to climate change.