backyard

Backyard Hazards: Your Best Bets for Survival

Black Tar Driveways A smooth black driveway may be easy to drive on and spray down, but the black coal tar sealants may contain concentrations of cancer-causing chemicals called polycyclic aromatic hydrocarbons, or PAHs. Coal tar sealants have been banned in some cities.  The research on this is still pretty new, so we can’t say […]