Background
Climate Change
Wikipedia
In recent usage, especially in the context of environmental policy, the term "climate change" often refers only to changes in modern climate, including the rise in average surface temperature known as global warming. In some cases, the term is also used with a presumption of human causation, as in the...
» Read more about Climate Change at Wikipedia
global warming
The Columbia Encyclopedia, Sixth Edition
global warming the gradual increase of the temperature of the earth's lower atmosphere as a result of the increase in greenhouse gases since the Industrial Revolution . The temperature of the atmosphere near the earth's surface is warmed through a natural process called the greenhouse effect. ...
» Read more about global warming at Encyclopedia.com
Earth Day
The Columbia Encyclopedia, Sixth Edition
Earth Day Apr. 22, a day to celebrate the environment. The first Earth Day was organized in 1970 to promote the ideas of ecology, encourage respect for life on earth, and highlight growing concern over pollution of the soil, air, and water. ...
» Read more about Earth Day at Encyclopedia.com