Back in the early 20th century, lead was considered the "Cadillac" of materials when it came to water pipes. And many cities are still dealing with the harmful impacts of lead's legacy.
Air pollution from diesel school buses is bad for kids on board or anyone that happens to be nearby. But new state laws are forcing schools to clean up their acts.
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?
