Carnegie Mellon and Texas A&M researchers found high levels of acrolein, a chemical found in manufacturing and formed in combustion. It is considered a hazardous air pollutant.
The bill would also require high-hazard trains to travel at slower speeds in newer cars, with better braking equipment and additional reporting requirements.
Some Pennsylvanians in Beaver County are worried about the land they grow crops on, the animals they hunt, the fish they eat and their long-term health.