Crosscut: On Sunday, September 21, I will be with my daughter in New York City, marching with tens of thousands of concerned citizens demanding action on the climate crisis. The march is timed to build pressure on world leaders and show support for U.N. Secretary General Ban Ki-Moon's Climate Solutions Summit on September 23. Almost a year ago, in December 2013, I was in Warsaw at the 19th Conference of the Parties (COP) for the U.N. Framework Convention on Climate Change the world's legally binding climate...