Dear EarthTalk: Is it true that playing on artificial turf fields can cause cancer? If so, how can I minimize exposure for my sports-loving kids? -- Melanie Witmer, Syracuse, NY
Just when you thought it was safe to play soccer on that brand new synthetic turf field, it may be time to think again. Those little black dirt-like granules that fill up the space between synthetic blades of grass and make up some 90 percent of today's artificial turf fields are actually ground-up car and truck tires. As such they contain a host of potentially noxious chemicals that can lead to a wide range of health problems.