Final answer:
The rise of environmentalism in the 1970s led to increased public awareness of environmental issues, marked by events like the first 'Earth Day' and influential publications like 'Silent Spring'.
Explanation:
Environmentalism gained prominence in the 1970s, focusing on conservation and protection of the natural environment. Concerns about pollution, energy crises, and environmental risks led to the rise of new environmental organizations and the popularization of ecological thinking.
Public awareness was heightened by events like the first 'Earth Day' in 1970, the publication of influential books like 'Silent Spring,' and the emergence of the environmental justice movement shedding light on environmental inequality and racism.
The 1970s also saw a politicization of environmental issues and a parallel development of various movements including feminism, gay liberation, and human rights activism.
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