Catalyst of the Modern Environmental Movement

During the late 20th century, the environmental movement gained significant traction in the United States, particularly in response to concerns over pollution, resource depletion, and the sustainability of natural ecosystems. Key pieces of legislation and influential books emerged during this period that shaped public consciousness and governmental policies regarding environmental issues.

Which of the following movements or events is widely recognized as catalyzing the modern environmental movement in the United States during the 1960s?