19 Sep '11, 4pm

Think Twice Before Sealing Your Driveway: Research shows that the coal tar used in most driveway sealants is a s...

Think Twice Before Sealing Your Driveway: Research shows that the coal tar used in most driveway sealants is a s...

Photo: Christopher Sessums / Flickr via Wikimedia Commons related articles By Dan Shapley Fall is the time when many homeowners hire contractors to seal the asphalt pavement in their driveways. But they may be unwittingly spreading pollution in the process, because most sealants are made from coal tar, and scientists have identified coal tar-based pavement sealers as a major source of toxic pollution to streams and lakes across the U.S. Since the Clean Water Act stopped rampant discharges of pollution from industrial pipes, the greatest source of pollution to most streams, rivers and lakes comes from rainwater runoff: As rain washes oils, salts and other pollutants off driveways, roads, parking lots and rooftops, the many small sources of pollution add up to big problems that can contaminate fish, damage streams and undermine entire ecosystems. For the nation's urban lakes...

Full article: http://www.thedailygreen.com/going-green/tips/driveway-se...

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