Every finding new source task is expensive because it is the task that requires a lot of experts. Moreover, it is not certain to answer that when they can find new sources and it has new sources or not. Searching new sources likes trying to find something that experts cannot answer when they can find it. Renewable energy sources is one of many tasks that need a lot of expenses and authorities. On one hand, some countries want to find new energy sources because they do not want to buy fuel from others. On the other hand, some of them do not want to do that because they think finding new energy source is too expensive and it is not worth. However, if governments who are the leader of the country do not dare to invest in something that has more benefits for countries, the countries will not be developed. Something they think that it is too expensive, but it has a lot of advantages that is worth to invest.