Mark Ruffalo: Erie mothers battle to stop drilling

Every day, mothers take hundreds of little actions to keep their children out of harm’s way, from steering them away from traffic to keeping toxic household cleaners out of reach. When you add it all up, it’s a heroic body of work.

But every once in awhile, mothers will do something so extraordinary to ensure the safety of their children that it alters the way we think about our world. Four mothers in Erie, Colo., are attempting to accomplish just that, and in doing so they will help expose the truth about natural gas.