Greenpeace is an international environmental organization founded in 1971 with the aim of protecting the environment and promoting peace. It was originally formed by a group of activists in Vancouver, Canada, who sought to stop nuclear testing by the United…

The Sierra Club is one of the oldest and most influential environmental organizations in the United States, founded in 1892 by naturalist John Muir and a group of like-minded conservationists. The club’s initial mission was to promote the conservation of…

Sylvia Earle is an American marine biologist, oceanographer, and environmentalist, widely regarded as one of the foremost experts on marine ecosystems and ocean conservation. Over her extensive career, Earle has made groundbreaking contributions to marine science, including her pioneering work…

Greta Thunberg (born 2003) is a Swedish climate activist who gained global recognition for her efforts to raise awareness about climate change and demand urgent action from world leaders. Thunberg began her activism at the age of 15 by skipping…

Ansel Adams (1902–1984) was an iconic American photographer and environmentalist, best known for his black-and-white landscape photography of the American West, particularly his images of Yosemite National Park. Adams’s work captured the grandeur and beauty of nature with unparalleled precision…

Edward Abbey (1927–1989) was an American author, essayist, and environmental activist known for his passionate defense of wilderness and critique of modern society. Abbey is best known for his novel The Monkey Wrench Gang (1975), which became a cult classic…

Wangari Maathai (1940–2011) was a Kenyan environmental and political activist, and the first African woman to receive the Nobel Peace Prize. She is best known for founding the Green Belt Movement in 1977, an environmental organization focused on tree planting,…

Aldo Leopold (1887–1948) was an American ecologist, forester, and environmentalist widely regarded as one of the most influential figures in the development of modern environmental ethics. Leopold is perhaps best known for his book A Sand County Almanac (1949), which…

John Muir (1838–1914) was a Scottish-American naturalist, environmentalist, and one of the most influential figures in the American conservation movement. Muir is best known for his advocacy for the preservation of wilderness areas, particularly in California. He co-founded the Sierra…

Rachel Carson (1907–1964) was a pioneering American marine biologist, conservationist, and author who is often credited with advancing the global environmental movement. Carson’s most influential work, Silent Spring (1962), exposed the dangers of widespread pesticide use, particularly DDT, and its…