Glencoe's Long-term Investigations offer an excellent opportunity for using cooperative learning groups to complete research activities over several days or weeks. We have expanded the Investigations by providing links to Web sites where students can gather up-to-date information. Choose an Investigation from the menu below to access related links.

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Greenpeace International
Read frequently asked questions about global warming, climate change, and the greenhouse effect.

United States Environmental Protection Agency
Welcome to the EPA Student Center. Spend some time here to learn about conservation, waste and recycling, air, water, and ecosystems.

University of Michigan, Ann Arbor, MI
Study this lesson on the greenhouse effect.

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United States Fish & Wildlife Service
Get outdoors with the United States Fish & Wildlife Service.

United States Fish & Wildlife Service Information Clearinghouse
If you want pictures, publications, and a wide range of other information available from the U.S. Fish and Wildlife Service - we want to make it easy for you to get it.

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American Heart Association
Read information from the American Heart Association about cigarette smoking and cardiovascular diseases.

American Heart Association
Consider these statistics on cigarette smoking from the American Heart Association.

American Lung Association
Examine facts about cigarette smoking from the American Lung Association.