I saw an episode of I Led 3 Lives from the early 1960s (about a US counterintelligence agent who infiltrated Soviet spy rings, based on a real agent).
The farmers were protesting the climate change that was causing a bad growing season and said it was caused by the US nuclear bomb testing. In the episode, it was motivated by Soviet agitators who wanted to pause US nuclear bomb testing while they caught up in development.
Communists have been claiming “green” socialism for longer than 20 years.
I’m not for dumping toxins in the river but I don’t believe that cow farts are killing the planet. Corn-gas isn’t saving the planet either.