First, when most of people thinking of energy, you thinking about fossil fuels or coal but i'm thinking about solar energy because you just need solar engine, that's it. I'm not the person who thinking about solar energy. If it is not full energy, then you have to pay but it is cheaper than the money we pay for fossil fuels or coal energy. In Da Nang, people also use solar energy even they use it at school and students said that they wish their house can use solar energy. In the Emirates, they use nuclear energy, nuclear energy equals lots of coal and fossil fuels and it is harmless. According to the statistic, Fossil fuels is the most used energy. Fossil fuels is not good for the enviroment.