Radon: Testing your home for the earth’s evil vapors.

Unlike other dangerous exposures to carcinogens, with radon there are no careless manufacturers or derailed trains full of chemicals to blame. Radon gas has emanated from the Earth’s crust for millenia, and it only became a problem with the invention of the indoors, where the radon gas that seeps from rocks becomes trapped and accumulates. Without a villain, the onus is on individuals to determine whether their homes are built over a radon-breathing crack in the earth.