Renewable energy comes from sources that cannot be depleted by human activity. The most common renewable energy sources are hydropower, geothermal, wind, solar, and biomass, which encompasses wood, ethanol, and biodiesel.
Although there are several benefits in using renewable energy, such as fewer greenhouse gas production and less pollution, it is necessary to consider that this type of energy has a limited amount available per unit of time. For that matter, renewable energy is not the most utilized in most countries, giving place to, for example, fossil fuel, which negatively impacts the environment.
In the United States, energy consumption from renewable sources increases every year. Since the significant sources of carbon dioxide released in the environment by the US are derived from the use of fossil fuels, the increase of renewable energy in the country could lead to a considerable reduction of CO2 emissions.