Kids at a Jewish camp weigh their food waste each day in an attempt to pare it down. Christians sing “Amazing Grace” as another Appalachian mountain is blasted to bits for coal. Muslims in suburban Chicago seek out a local producer of humanely raised, organic, halal meat. The stories of faith-driven environmental consciousness in Renewal drive home the point that the green movement is amassing some serious prayer power. It’s not a backhanded compliment to say that the film is a hit on the church-basement circuit.