Topics related to the environment along with ideas and resources for environmental activism. The site is no longer updated but the site still includes many useful links.
" A guide to commonly encountered toxic chemicals, environmental health risks, and the public's health. From the US National Library of Medicine." Interactive!
Previously named FirstGov.gov, this portal opens to a staggering array of information about the United States. Pull down "Explore Topics" and/or "Audiences" to "Teens" for a plethora of choices.