You are one of seven billion people on Earth. Put bluntly, whatever you do personally - eat tofu in a Hummer or hamburgers in a Prius - the planet doesn't care. Nor, for that matter, does the economy. And when confronting the entwined challenges of climate change, species preservation, and a planet going off the cliff, it is what several billion people do that makes a difference. The solution? Not scientists, not politicians, not activists. Cue the economists. The hope of mankind, and indeed of every living thing on the planet, is now in the hands of the masters of the dismal science. But "Will the Planet Notice?" is the Environmental Defense Fund economist Gernot Wagner's tour of global economics and of the economists wrestling with the scope of climate chaos and the means of realigning incentives to resolve the threat.