The Sierra Club is one of the oldest and most influential environmental organizations in the United States. Founded in 1892 by naturalist John Muir, it aims to protect the planet's natural resources and promote sustainable practices. The club engages in various activities, including advocating for clean air and water, preserving wilderness areas, and fighting against climate change. Members of the Sierra Club participate in outdoor activities like hiking and camping, which help foster a love for nature. The organization also educates the public about environmental issues and encourages community involvement, making it a vital force in the movement for a healthier planet.