Living on Earth: GELLERMAN: It’s Living On Earth, I’m Bruce Gellerman. [CHANTING: “COAL HAS GOT TO GO, COAL HAS GOT TO GO.”] GELLERMAN: Police in the nation’s capital estimate 2,500 demonstrators recently took to the streets of Washington, DC. The protesters blocked the gates to the coal-burning power plant that heats and cools the US Capitol and many nearby federal office buildings. Despite the frigid cold weather – and the possibility of arrest – the protesters wanted to bring the …