Watching the video will be an hour well spent.
George, in the Q & A session, starts around 51 minutes:
“…and this is also a problem for Marxism. Keynes has absolutely nothing to say about the environmental crisis, which is the biggest crisis – by far – that we confront. The Keynesian fiscal stimulus accelerates the environmental crisis. Under the Keynesian vision, just as under the neoliberal vision, salvation is indistinguishable from catastrophe. Everything that is good economically is bad environmentally because you are stimulating economic growth which is the fundamental driver of environmental destruction.”
At a little over an hour, he gets into discussing the European Green Parties, and how difficult it is to distinguish their approach from that of other leftish parties. It’s something we should no doubt be working on.