I want to know the answer to the following question:
Why was green chosen for a number of new European political parties in the 1980s?
All the background I'm provided with is that "The largest green party in Europe is Alliance '90/The Greens (German: Bündnis 90/Die Grünen) in Germany, which was formed in 1993 from the merger of the German Green Party, founded in West Germany in 1980, and Alliance 90, founded during the Revolution of 1989–1990 in East Germany.". Is that enough to answer the question?