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.

I'm far less a leader than a writer.

If one wanted to stigmaitise, that's how one would do it - lots and lots of people saying "we're severing our ties".

I'm guessing the most efficient way would be to transfer an awful lot of technology, but also direct aid to deal with climate emergencies already underway. Hillary [Clinton] has already said $100 billion a year would be appropriate.

In the end, climate change is a math problem.

We can either save the planet from catastrophic warming, or protect fossil fuel CEOs. Not both. Do the math(s)

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