[quote:6bd04]Because some toxic chemicals are used in making PV panels, disposal at the end of their useful life is another potential environmental issue. Now, only a small volume of PV panels is disposed of each year, so this is currently a minor issue. But the industry is already looking ahead toward recycling methods for future PV panels. Find out more about PV panel disposal and recycling.
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http://www1.eere.energy.gov/solar/to_environment.html