An ancient region associated with significant deforestation due to civilization growth.

A practice used by cultures in China, India and Peru to maintain soil fertility.

He traced a cholera epidemic to a contaminated water pump in 1855.

A concept is associated with Gifford Pinchot.

The movement is associated with demands for replacing petroleum with farm alcohol.

The organization which conducted studies on carbon dioxide buildup during the International Geographical Year projects.

She testified in the 1965 Senate hearing about leaded gasoline. 

A specific event that affected public perception of nuclear power.

The environmental issue that became a serious concern leading to the signing of the Montreal Protocol in 1987.

The organization that acknowledged the severity of leaded gasoline poisoning?