Fossil fuels won't last forever, and they are bad for the environment. Alternative energy sources could provide cleaner energy. The sun, and other stars like it, are the largest energy producers in the universe. They produce energy by a process known as nuclear fusion. Is there any way we can replicate this process, in order to create energy of our own? Our current fuel source, fossil fuels, being consumed faster than it can be produced. A more sustainable way to provide energy will be needed in the future; I believe that will be nuclear fusion. Fusion is the combining of two atoms. This is difficult since atoms of the same element, like to repel each other. This is due to the fact that they are made up of protons and neutrons, and a large force is required to bring the atoms passed their electromagnetic repulsion. Nuclear fusion is the most basic form of energy in the universe. It is what powers the sun, and all of the stars. It is produced by a nuclear reaction in which two atoms of the same lightweight element, typically an isotope of hydrogen, combine into a single molecule of helium, the next heavier element on the periodic table (Power). The hydrogen bomb is essentially a fusion reaction, that is uncontrolled in which all of the energy is released at once. If the same amount of energy could be slowly released, in a controlled reaction, then this could be the ultimate form of energy for Earth. Assuming fusion energy is not only possible, but easy and containable; what would the advantages and disadvantages of this energy source be? For starters, the fuel for a fusion reaction is the most abundant element in the universe, hydrogen. With no hydrogen shortages, it would appear we would have enough fuel to last us quite a while. "The generation of electricity through nuclear energy reduces the amount of energy generated from fossil fuels such as coal and oil. Less use of fossil fuels means lowering greenhouse gas emissions" (Nuclear