Reuters: Several thousand Catholics, Protestants, Buddhists, Hindus, Jews and Moslems marched through Rome to the Vatican on Sunday to demand action on climate change and thank Pope Francis for his encyclical on the environment. They marched behind banners reading "Many Faiths - One Planet" and "The Earth - Our Common Home - Climate Action Now!" to lobby leaders to take decisive action at a United Nations summit in Paris this year to stem the effects of global warming. Speaking to crowds gathered in St....