Huffington Post: Last week, President Obama made it crystal clear that his administration "will respond to the threat of climate change, knowing that the failure to do so would betray our children and future generations." But he also made clear taking action is much more than an obligation to posterity, it is also an issue of American leadership: "The path towards sustainable energy sources will be long and sometimes difficult. But America cannot resist this transition; we must lead it." Now, with Sen. Kerry's nomination...