Internet Field Trip: The Way We Use Water Internet Links United States Environmental Protection Agency: Gulf of Mexico Program: What on Earth Do You Know About Water? Here are important facts about using and conserving water. http://www.epa.gov/gmpo/ United States Environmental Protection Agency: Nonpoint Source Kids' Page What's wrong with this picture? http://www.epa.gov/OWOW/NPS/kids/whatwrng.htm Internet Field Trip: Rocks and Minerals Internet Link Gem By Gem Select a gem in the Image Library to see a variety of each gemstone. http://gemstone.org/image_library_frameset.html