What factors increased Americans concerns about the environmental issues during the 1960s?

During the 1960s, increasing concerns about environmental issues in America were fueled by a growing awareness of pollution, exemplified by events like the Santa Barbara oil spill in 1969. The publication of Rachel Carson's "Silent Spring" in 1962 highlighted the dangers of pesticides and their impact on ecosystems, prompting public debate. Additionally, the rise of the counterculture movement and the first Earth Day in 1970 helped galvanize grassroots activism, further amplifying environmental awareness. This decade marked a pivotal shift towards recognizing the interconnectedness of human health and the environment.