There's no huge mystery. If you dig up huge amounts of carbon, huge amounts of ancient biology, hundreds of millions of year's worth of ancient biology, and flush it into the atmosphere in a matter of decades, then it stands to reason that we're going to have enormous effects, and now we can see those effects all around us.

Without a movement pressing for change, there's little hope. We've got to work the political system to make this happen fast. The physics and chemistry are daunting. The resources on the other side are very large.

People in low-lying countries like Bangladesh with almost 140 million people who are managing to feed themselves, whose carbon emissions can't really be calculated (they are a rounding error in the UN's attempts to do national comparisons), and yet, most of whose people are at risk from increased flooding due to rising sea levels.

Sometimes, I, anyway, get tired of playing defence, and like to play offence.

Solar power seems to be truly bipartisan in its appeal.

We have to transition to new technologies, making it more expensive to continue with the old and polluting technologies and cheaper to go to the clean ones.

There is an urgent need to stop subsidizing the fossil fuel industry, dramatically reduce wasted energy, and significantly shift our power supplies from oil, coal, and natural gas to wind, solar, geothermal, and other renewable energy sources.