Generating energy supplies without fossil fuels
People will have to build electricity generating power stations which use nuclear fuel, together with a mix of as many as possible renewables like wind and solar power. The aim is to have all electricity generation from sources which don't release CO2 into the air. Renewables are carbon-free but have a big problem of not being available for some of the time. Solar electricity doesn't work at night and wind turbines don't work in calm weather, but people want power to be there all the time. All renewables have a low energy density - which means that you need a vast number of wind turbines (for example) to generate the same amount of electricity as one power station. What's more, nuclear power has the advantage that it can produce very large amounts of electricity reliably for many months at a time. It does have problems - mainly what to do with radioactive waste - but these are far less important than the problems brought about by burning fossil fuel, especially coal. What's more, there are even safer and better nuclear plants that could be built. These could burn up radioactive waste and the unused uranium fuel that is mostly wasted in today’s nuclear power plants (see my page on this). They could also use another, safer and more abundant nuclear fuel called thorium.