Coal Tar Is a Dangerous Substance

Asphalt's a natural substance. Tar is not. It's a man made substance. And often et what you see in playgrounds in driveways, very dark black coating. That's coal tar. A fewstates have actually banned it right now. But i will bet a nickel that eventually we're not going to be a coting driveways and playgrounds and parking lots with coal tar. The asphalt itself is not a particular pot, but the run off is.