HOUSTON -- With the switch to digital televisions on Friday, environmentalists are encouraging everyone to recycle or reuse their old televisions, so they won't end up in landfills, KPRC Local 2 reported.

Recycling advocates said Americans tossed out more than 20 million TV sets in 2008 and the so-called e-waste typically contains lead, mercury and other toxic materials.

"Obsolete TVs and other electronics contain toxic components that can harm public health if we toss e-waste in landfills and incinerators," said Zac Trahan, Program Director of the non-profit group Texas Campaign for the Environment. "Texans can protect our environment by extending the useful life of their televisions; or, if they are replacing a TV, recycle the old set responsibly."

The U.S. EPA estimates that 99 million old TV sets are not in used and stored in American homes.

Environmentalists said reusing the old TVs should be the first option. A converter box can be used to make the old set work with a digital signal.

But for those who want to trash their TVs, they should recycle them, officials said.

Not all TV manufacturers providing recycling options. However, TV-makers such as Sony, Samsung and Panasonic offer free recycling at limited locations throughout the Houston area.

Residents can bring any Sony or LG/Zenith products to CompuCycle, 7700 Kempwood Drive, for free recycling. Other brands are accepted as well, but a small fee is charged.

All Best Buy locations currently recycle TVs under 32 inches for a $10 fee. With it, consumers will receive a $10 gift card to spend at the store.

For more information on which manufacturers provide free recycling and locations to drop off equipment, visit www.texastakeback.com.

Lawmakers and environmentalists encouraged Texas Gov. Rick Perry to sign House Bill 821, which would require TV makers to be in charge of recycling for their products.