Fossil Fuels

Fuel Cell

Fuel Economy

Gauley Bridge, West Virginia

Gibbs, Lois Grassroots Environmental Activist and The "Mother of Superfund" (1951–)

Global Warming

Government

Green Chemistry

Green Marketing

Green Party

Green Revolution

Greenhouse Gases

Greenpeace

Groundwater

Halon

Hamilton, Alice Workers' Advocate (1869–1970)

Hayes, Denis American Environmentalist; Organizer of First Earth Day (1944–)

Hazardous Waste

Health, Human

Heavy Metals

History