Renewable energies use natural resources that can be naturally replenished. These include sunlight, wind, tides, and geothermal heat. Renewable energy technologies include solar power, wind power, hydroelectricity, biomass, and bio-fuels.

More than 10 percent of primary energies are produced from renewables, with a large percentage contribution from traditional biomasses, for example wood burning, etc. Similarly hydropower contributes significantly to modern technologies. Geothermal, wind, solar, and marine energies are some other readily available modern technologies in use.

The renewable energy market continues to grow inspite of the energy technologies being criticized. Widely used in European countries and the USA, wind power has large worldwide installations. PV power plants are popular in Germany. The photovoltaics industry recorded high output levels in the year 2006. Solar thermal power stations are also operative in America and in Spain. The Geysers in California have the world's largest goethermal power installation. Brazil has large renewable energy programs that involve ethanol fuel production which contribute to the country's automotive fuel.