A basic rule of life for reporters is that you should spend your time talking with and learning about people who are not sending you press releases, rather than those who are.

Chinese emissions are a problem not just for its own people but also for the world. It has now overtaken the U.S. as the biggest carbon emitter; most of the coal that is burned anywhere on Earth is burned in China.

For a decade or more after the Vietnam war, the people who had guided the U.S. to disaster decently shrank from the public stage.

Everyone in the Chinese economic world knows that the country is not going to move out of cheap-workhouse status, toward the realm of 'real' rich-country corporate power and prosperity, unless (among other changes) it begins removing these price distortions.

The Endangered Species Act is the strongest and most effective tool we have to repair the environmental harm that is causing a species to decline.

I hope that in future Congresses there will reemerge a recognition that climate change is a reality, that our policies to meet our energy needs must also deal responsibly with environmental issues, including the damage caused by greenhouse gas emissions.

I find the parallels between how some investors refuse to recognise the trends and our reaction to some of our environmental challenges very powerful. There is an unwillingness to process unpleasant data.

Once upon a time, I was a climate-change skeptic.