As the pent-up glaciers of the Antarctic are about to start flowing into the sea now that an “ice bridge” yoking a major ice shelf to the continent is gone, you poke fun at last week’s Bonn preparations for the replacement of the United Nation’s Kyoto treaty at the climate jamboree in Copenhagen at the end of this year (“When Glaciers Start Moving,” April 11, 2009). You poke fun at the return of the United States to the proceedings. And you poke fun at all attempts to bring climate change closer to the heart of proceedings at the recent G20 summit in London. But you forget that no matter how tedious the progress of the United Nations may have been, and no matter how far it might end up from reaching an agreement that could indeed save the planet from the ravages of climate change, the human species has never been closer to a collective response to a challenge of global proportions. In short, it is time to rejoice even if for the last time in who knows how many years to come.