. >> there are a wide variety of things we can use coal ash for, rarather than throwow it away.. the most prominent uses are, uh, using coal fly ash in concrete. every ton of fly ash we put into coconcrete is a ton o of cementt doesn't need to be made, and not making that ton of cement has saved over 11 million tons of co2 emissions last year alone. used p properly, coal ash is a safe material for beneficial usese. the levels of metals in coal ash are comparable to the levels of metals in n the dirt and rocks in yourur backyard. we believe the best solution to coal ash disposal problems is to quit throwing it away. in parts of ththe country, these historic coal mines have a tremendous problem with acid mine drainage. you'veve seen n the oranange-cod creeks and those kind of things. coal ash can actually be u used, uh, to modify the ph in those settings and relieve that acid mine drainage. so that's an examplple where you actuallyly t to put the cocoal ash in contact with the water because e it's-- it improves ththe water quality by doing that. >> but local people in pennsylvania