Readers might be interested to know that the people behind this documentary are ex members of the UK Revolutionary Communist Party (RCP), who used to publish the magazine LM, once "Living Marxism", the official newsletter of the RCP. They continue to push the agenda they promoted within the RCP through the Institute of Ideas and the online magazine spiked. If anyone wants to check them out, try a Google search of "Martin Durkin Against Nature" (the title of another anti-environment documentary by this programme's director from the 1980s), or "LM group revolutionary communist party".
But don't take my word for it - dig around on the web and see what the Revolutionary Communists behind this stuff are up to, and make you own mind up about their legitimacy.