Associated Press: Several thousand demonstrators on Monday urged Congress to pass legislation to reduce greenhouse gases, and they targeted the government’s own Capitol power plant as a symbol of the problem. An enthusiastic crowd of mostly young people marched from a park near the Capitol to the small power plant several blocks away, chanting “We don’t want the world to boil, no coal, no oil!” Some demonstrators peacefully stood in front of the power plant’s gated entrances while police stood …