Plenty of people remarked on Al Gore’s comment, in my Thursday column, encouraging young people to engage in peaceful protests to block new carbon sources. Specifically, he said he was stunned that people weren’t blocking bulldozers constructing new coal-fired power plants.

There is, in fact, an effort to build more of a protest movement around climate change. Bill McKibben, an old college classmate whom I met when we both tried out for the Harvard Crimson in September of our freshman year, has become a leader in the effort to curb greenhouse gases. Bill worked about 100 hours a week on the Crimson and is now directing his vast energy to mixing journalism and activism to keep the sea level where it is. Bill has started a new website, www.stepitup2007.org, focused on the effort to galvanize a climate protest movement. Check it out.