This week on The Allegheny Front, a Bradford County woman's health problems raises new concerns over gas drilling: barium in well water. In other Marcellus news, a federal hearing on hydraulic fracturing, and a local impact fee moves through the state legislature. We check out Pittsburgh's solar project. In this week's Allegheny Front Rewind, the evolution of conservation efforts in Pennsylvania. And a city kid--our high school intern--learns to appreciate green space.