The front door to an extensive site. You may get lost in this site. A good place to get information regarding the main concerns in environmental chemistry. NASA not only sends up the space shuttle, but also directs satellite sensors toward earth. In their Mission to Planet Earth experiments, NASA is able to map the some components of the earth's chemistry, in particular stratospheric ozone.
Some data is available on CD ROM for the asking.
NASA's famous remote sensing satellite responsible for much of what we know about the structure of the ozone holes. One of the National Institutes of Health. Responsible for environmental health issues and toxicology. A major player in research regarding global change. Research expertise and data include changes to the oceans and atmosphere as well as the chemical transport interface between air and sea.