In the wake of the bridge collapse in Baltimore, an engineering expert tells us how Pittsburgh-area bridges might hold up in the face of extreme impact.
Using recycled plastic in construction materials may not be a great idea after all tucsonsentinel.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from tucsonsentinel.com Daily Mail and Mail on Sunday newspapers.
"Not including PVC is a missed opportunity. Post-consumer recycled PVC is already being used successfully in drain, waste, and vent piping," said VI spokeswoman Susan Wade.