Without the greenhouse effect, Earth would not be inhabitable. A thorough online resource describes the greenhouse effect and how it occurs. The source highlights the different types of gases that work together to absorb the sun's...

It actually is possible to have too much of a good thing when it comes to climate change. A slide show lesson describes how burning fossil fuels contributes to climate change. Individuals read about the scientific process and the...

The official website for Union of Concerned Scientists provides information on environmental issues and suggestions on actions people can take to curb environmental harm.

An interesting site that shows early photographs by Henry Chandler Cowles and George Damon Fuller and others. The images range from ecological settings to the consequences of human changes to the environment.