An environmental activist may refer to a person who advocates and works for the cause of protecting the natural environment from various forms of destruction and degradation. An activist may be strongly passionate about conservation of the environment, its improvement, preservation, pollution control and plant and animal diversity. An environmental activist works for various environmental issues and campaigns including climate change, sustainable development, sustainable agriculture, waste management and renewable sources of energy among others. The need to protect the environment in various ways was recognized as early as 1272, when King Edward I of England forbid the practice of burning of sea coal. While during the Industrial Revolution in Europe, pollution in the air was one of the mainly recognized environmental problems of that time. The term environmentalism, originated in the year 1922 as a social movement with the main objective of influencing political process related to the environment. Environmental activists in the 21st century have been using the internet effectively, to create awareness about environment related issues and launch various environmental campaigns. Learn more intriguing and informative facts about some of the world’s most famous environmental activists, with their biographies that include trivia, interesting facts, timeline and life history.