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	Davey: Father of Tree Surgery John Davey, of Kent, became the "Father of Tree Surgery" when he established the Davey Institute of Tree Surgery.
	First Documented Animal Extinction The Cincinnati Zoo housed Martha, the only surviving passenger pigeon, whose death there in 1914, marked one of the world's famous extinctions.
	First Municipal Weather Forecasting Cleveland Abbe, a Cincinnati meteorologist, in 1869 established the first public weather service in America.
	Rowland: Friend of the Environment Dr. F. Sherwood Rowland shared the discovery that refrigerants and aerosol sprays containing Freon were destroying Earth's protective ozone layer.
	Serpent Mound The Serpent Mound is one of North America's most spectacular effigy mounds, and the first privately funded archaeological preserve in the U.S.
	TVA Model Ohio's state legislature passed the Ohio Conservancy Act, allowing the formation of watershed districts to provide protection from floods.
	The Seven Ranges Survey Thomas Hutchins, the first Chief Geographer of the U.S., in 1785 did a landmark survey of public lands known as the "The Seven Ranges" survey.
	PDF Containing All Environmental Resources Topics