There are numerous energy resources in use today: fossil fuels (coal and gas), wind, solar, hydroelectric, etc. Another very important and controversial energy resource is that of nuclear power. It is produced from nuclear fission: uranium rods undergo a "chain reaction", which produces heat. This heat can be used in different ways as an energy resource. There are many nuclear power stations around the world. Nuclear power answers about 11% of the world's energy needs, and there are also ships and submarines that use a nuclear power plant as an engine. But is nuclear power the way forward? What are the pros and cons of nuclear power?