Each Sunday, worshippers file into the York-Ogunquit United Methodist Church beneath a cross and, since February, a symbol of another sort. The church's roof is now partly covered by an array of solar panels that make electricity to run the lights and heat inside the sanctuary. It's perhaps the most visible evidence yet of a growing environmental ethic spreading through Maine's religious communities. "Certainly we want to lower our power bill," said William Wieting, chairman of church's board of trustees. "But the enthusiasm didn't derive from the monetary value to the church as much as it was the right thing...