Shell's new petrochemical facility in western Pennsylvania could bring emissions of some air pollutants back to levels the region hasn't seen since the 1990s.
To meet pollution requirements for its new petrochemical plant, Shell plans to buy emissions credits from power plants that have been closed for years. And yes, that's legal.
Shell is moving forward with plans to build an ethane cracker facility near Pittsburgh. But what the heck is an ethane cracker? And what are the potential risks?