I want to know the answer to the following question:
What movement occurred during the 1970s?
All the background I'm provided with is that "The history of ecology in the 20th century is closely tied to that of environmentalism; the Gaia hypothesis, first formulated in the 1960s, and spreading in the 1970s, and more recently the scientific-religious movement of Deep Ecology have brought the two closer together.". Is that enough to answer the question?
Answer: yes