In just two decades Sweden went from burning oil to fissioning uranium. And if the world as a whole were to follow that example, all fossil fuel–fired power plants could be replaced with nuclear facilities in a little over 30 years. Greenhouse-free in a little over thirty years! A best-case scenario for conversion to 100 percent nuclear power could enable the world to stop burning fossil fuels and start fissioning uranium for electricity within 34 years. So who is ready to stop climate change in its tracks?