Explanation:

Sunderlal Bahuguna was an Indian environmentalist and Chipko movement leader. The idea of the Chipko movement was suggested by his wife. He fought for the preservation of forests in the Himalayas, first as a member of the Chipko movement in the 1970s, and later spearheaded the anti-Tehri Dam movement from the 1980s to early 2004. He was one of the early environmentalists of India, and later he and others associated with the Chipko movement and started taking up wider environmental issues, such as being opposed to large dams..