If we had about 100 years, that sort of slow cultural conversion would be exactly the thing to do. But physics is calling the tune here. We've got to respond to a timetable that physics has set for us.

The latest computer modeling I've seen indicates that at mid-century, there might be 150 million people classified as "environmental refugees."

We've lost half the summer sea ice in the Arctic. We've wiped out an enormous percentage of the world's coral reefs. We see huge changes in the planet's hydrology already, the cycles of drought and flood both amped up because warm air holds more water vapor than cold. These things are happening with a one-degree increase and going to two degrees won't be twice as bad, the increase in damage won't be linear, it most certainly will be exponential. So it was precisely the wrong moment to elect Trump.

The flaw is the business plan - digging up and burning way more carbon than physics says we can deal with. So, I suppose it's some kind of mid-point between writing them nice letters asking them to stop and figuring out a way to take down the entire system- which I don't have any idea how to do.

Climate change is a huge problem, an almost insoluble problem, for two reasons. One is the habits of the West in terms of consumption. The other is the incredible iniquity between poor countries and rich countries on this planet.

We'd like to get the fossil fuel industry on the back foot for a while, having to deal with us.

You can have a healthy fossil-fuel balance sheet, or a relatively healthy planet