Danger in Kids Playground?

Well this isn't the sort of thing that you want to read about, especially since my kids school has this stuff.

SAN FRANCISCO - The federal government is reconsidering whether sports fields and playgrounds made from ground-up tires could harm children's health after some Environmental Protection Agency scientists raised concerns, documents show.

The EPA is concluding a limited study of air and surface samples at four fake-surface fields and playgrounds that use recycled tires — the same material used under the Obama family's new play set at the White House.

Although the EPA for years has endorsed recycled-rubber surfaces as a means of decreasing playground injuries, its own scientists now have pointed to research suggesting potential hazards from repeated exposure to bits of shredded tire that can contain carcinogens and other chemicals, according to internal EPA documents.