Nat quoted Marx in the Anthropocene by Kohei Saito
Today, at least the existence of Marx’s ecology – its usefulness and scientific validity put aside for now – retrospectively appears so obvious that one may wonder why it was neglected for such a long time. Here one can point to one reason. [..]. It did not occur to [researchers] that Marx, especially in his later years, quite intensively studied the natural sciences and left behind a large number of notebooks consisting of various excerpts and comments related to environmental issues
— Marx in the Anthropocene by Kohei Saito (Page 16)
Having been born after the collapse of the USSR, I've never seen any of this in my lifetime. Basically since I've been interested in both Marxism and degrowth, I've seen the two ideas intertwined. It's fascinating to think that this, as a development, is at most 30 years old, and if I had grown up at any other point in history it's likely that I would have understood "Red" and "Green" to be ideologically opposed.