The environmentalists say we’re doomed if we don’t drastically reduce consumption. The technologists say that human ingenuity can solve just about any problem. A debate that’s been around for decades has become a shouting match. Is anyone right?

After every mass shooting or terrorist attack, victims and survivors receive a huge outpouring of support — including a massive pool of compensation money. How should that money be allocated? We speak with the man who’s done that job after many tragedies, including 9/11. The hard part, it turns out, isn’t attaching a dollar figure to each victim; the hard part is acknowledging that dollars can’t heal the pain.