What did john Muir do to the environment?

John Muir was a prominent naturalist and environmentalist who played a crucial role in the conservation movement in the United States. He co-founded the Sierra Club in 1892, advocating for the preservation of wilderness areas and national parks. Muir's efforts were instrumental in the establishment of several national parks, including Yosemite and Sequoia, and he emphasized the importance of protecting natural landscapes for future generations. His writings and activism helped raise public awareness about environmental conservation and the need to protect nature.