Climate Desk: On February 17, more than 40,000 climate change activists--many of them quite young--rallied in Washington, DC, to oppose the Keystone XL pipeline, which will transport dirty tar sands oil from Canada across the heartland. The scornful response from media centrists was predictable. Joe Nocera of the New York Times, for one, quickly went on the attack. In a column titled "How Not to Fix Climate Change," he wrote that the strategy of activists "who have made the Keystone pipeline their line in the...