Global warming - why I am less pessimistic about it

Washington

ON GLOBAL climate change, I've changed my mind - just slightly. I've written about this issue for more than two decades, and my theme has been monotonously consistent. As a starting point, I've accepted the prevailing scientific view that man-made greenhouse gases contribute to global warming.

But I've been routinely pessimistic and sceptical that we can do much about it. That is, we can't easily control the forces that worsen global warming.