Environmental historians are

Environmental historians are Paul Ehrlich, Donella H. Meadows and Rachel Carson.
Paul Ralph Ehrlich is an American biologist best known for his pessimistic and wildly inaccurate predictions and warnings about the consequences of population growth and limited resources.
Donella Hager "Dana" Meadows was an American environmental scientist, educator, and writer. She is best known as lead author of the books The Limits to Growth and Thinking in Systems: A Primer.
Rachel Louise Carson was an American marine biologist, writer, and conservationist whose influential book Silent Spring and other writings are credited with advancing the global environmental movement.