The modern environmental movement became a powerful force in the 1960s. It's built on early 20th-century efforts to conserve the natural world, preserve wilderness, and control pollution. But after World War II the movement was also a response to profound changes in American life. These changes continue today. The National Park Service preserves the places where we can contemplate the value of nature. Discover the people, places, and stories about the meaning of our lands.
Last updated: October 20, 2017