Researchers say too many deer and invasive plants are threatening the long-term survival of Pa.'s forests. A filmmaker of a new documentary about a massive effort to clean up a Western Pa. river says it's a hopeful story. The author of a book about individual liberty and private property rights argues that signing a gas lease shouldn't be one of those rights.

More wind turbines in the ocean mean more renewable energy on the grid. But what's the impact on fisheries? Pennsylvania's attorney general files criminal charges for the Mariner East pipeline.  A new group is encouraging people to retire their lawnmowers and leaf blowers and plant native species.