Reducing mercury pollution is a top priority in the state these days. Recent attention has focused on New Hampshire's biggest polluter, coal burning power plants. But burning the fossil fuel is just one way mercury gets into the environment. It's also found in many products from batteries to thermostats. And if they're not disposed of carefully, harmful mercury can find its way into the environment. New Hampshire Public Radio's Rebecca Kaufman reports on one source the state is hoping to more closely regulate ---the dentist office.
