What caused president Richard Nixon to act on environmental issues?

President Richard Nixon acted on environmental issues largely due to growing public concern and activism in the late 1960s, exemplified by events like the Santa Barbara oil spill in 1969 and the first Earth Day in 1970. These events highlighted the urgent need for environmental protection and influenced public opinion, pushing Nixon to prioritize environmental legislation. Additionally, he recognized the political advantage of addressing these issues, which resonated with an increasingly eco-conscious electorate. This led to significant initiatives, including the establishment of the Environmental Protection Agency (EPA) and the implementation of key environmental laws.