Grist: Last month`s big People`s Climate March could have shut down New York if it wanted to - or so I heard the next day from a New York police officer, regaling a group of tourists with the story. But then, the march wasn`t about shutting down New York. It was about making the number of people concerned about climate change into a visible thing - even if some of those people, like the International Brotherhood of Electrical Workers, were also lobbying against the regulation of power plant emissions and...