Krzysztof Gazlalek, a Catholic priest in central Poland, is committed to fighting climate change. When faced with huge electricity bills, he found an inspired way to solve the problem. He installed 18 solar photovoltaic panels shaped into a 40-ft.-high cross on the front of his church. During the day, the cross generates electricity and, by night, the it becomes a colorful light show -- a great way to blend faith with saving the planet.