Richard Branson got at least one thing right. He showed us the kind of bold model that has a chance of working in the tight time frame left: the profits from our dirtiest industries must be diverted into the grand and hopeful project of cleaning up their mess. But if there is one thing Branson has demonstrated, it is that it won’t happen on a voluntary basis or on the honor system. It will have to be legislated—using the kinds of tough regulations, higher taxes, and steeper royalty rates these sectors have resisted all along.