This research paper will examine the facts why we should use renewable energy and which causes that we will face if we don’t act soon. Using renewable or green energy sources enables us to reduce the carbon dioxide percentage that goes into the atmosphere because of the energy nowadays we use. It is proven fact that using such as nuclear power plants or oil as an energy source increases the carbon dioxide level in the air and this helps to reduce climate change. By using renewable energy sources like solar energy, not only we slow down the global warming effect but also we reduce our dependence on oil and coal reserves, which are becoming more expensive each day and more difficult to find. This paper will also explain what really renewable energy is, why renewable energy plats cost more by the build up. To sum up, I think that we should stop harming the environment as soon as possible and in my paper I seek to help the others to understand the facts if we don’t act soon.