Green energy is the term used to describe renewable sources of energy, such as solar, wind, geothermal and hydroelectric power. These sources are sustainable because they do not deplete resources or cause pollution like traditional fossil fuels. Green energy can be used to generate electricity for homes and businesses, heat water and air in buildings, provide transportation fuel alternatives and more. It is a cost-effective way to reduce emissions while providing clean power that will last indefinitely with proper maintenance. Green energy is an important part of a sustainable lifestyle, and it can help to reduce our dependence on fossil fuels.