Here are a few more great sites we found to help kids out during Earth Week....
Interesting site about pollutants:
This is a great site for kids, lots of great information on topics from taking care of the earth to educational facts: http://www.factmonster.com/
Here is a great site to check out the air quality in your neck of the woods, just click on the map and get your daily air quality forecast: http://www.airnow.gov/
This is a great site for studying the earth and biomes with the kids: http://www.cotf.edu/ete/modules/msese/earthsysflr/biomes.html