Renewable energy is the energy of the future: safe, clean and environmentally friendly. It can be provided with the sun, the wind, the sea, and the plants. People may be independent from the natural gas and even nuclear power. While the nuclear plants produce more energy, they are still dangerous. Natural gas will disappear some day, and it is one of the biggest sources of the CO2 and other greenhouse gases, which release during the burning. Thus, people should have the steady way to have as much electricity as they need for living and developing.