Bob Carson, air quality specialist at Mammoth Cave National Park, shows how mercury is collected from rainwater and describes how mercury can be harmful as it is transferred from contaminated water up though the food chain.
Copyright © 2001-2011 KET
This is a known issue with the Window Media Video format.
Windows Media plugin is no longer maintained in Firefox, causing it to stop working.
If you are still having problems, you can email firstname.lastname@example.org or call: 859-258-7259.