Nuclear energy is cheap to produce unlike fossil fuel based energy. When nuclear energy is used there is a baseline of energy that is produced, that will stay the same no matter the conditions; unlike wind, or solar power. A plants production level can be lowered if there is a lot of energy from the sun or wind available, but it can also be raised if there is less energy available from these sources. Nuclear power plants create relatively low pollution because humans do not have to harvest resources from the ground as we do with oil. This lack of harvesting lessens the environmental impact of the nuclear power plants, but nuclear power plants are still dangerous to animals due to the radioactive waste. Nuclear power plants mainly use uranium for fuel, but other substances such as thorium. There is enough uranium available in the earth to produce energy at our current rate for eighty years. Nuclear energy is not a renewable source of energy but with the use of breeder reactors, or nuclear fusion we could possibly turn nuclear power into a sustainable energy source. With innovations in atomic fusion, we are getting closer and closer to being able to create a completely renewable source of energy. At this moment in time using these options to make renewable energy is not practical, but with time I think that they will be. The energy released in a nuclear fission reaction is ten million times greater than that of an atom of fossil fuel reacting. With all of these positives, there are negatives as well. In 1986 a nuclear accident occurred, leaving between 15,000 and 30,000 people dead. A similar incident occurred on March 18th 2011in Japan. This repeating of disasters shows that nothing can really be done to completely protect the world from a horrible accident such as the ones that occurred in Japan, and Chernobyl. Another negative aspect of a nuclear power plant is not the emissions that come straight from the plant its self, because those levels are very low, they actually come from the process of mining Uranium. Here in Massachusetts 14 percent of the electricity generated is from nuclear power. Nuclear power has many pros, and a few cons; but, in my opinion, the dangers and the pollution caused by the plants is enough to make me concerned that if too many plants are built many people could be at risk of a nuclear accident. If there was a way to cut the dangers, and the emission levels of the plants down significantly I think then it would be Ok to build more plants.