Renewable energy is distinguished from fossil energy, or non-renewables, by the time it takes to form. Renewable energy uses energy from the sun, winds, waves and other direct energies or forces. Also bio-fuels are considered as renewable, even though there is no balance between the production and e.g. incineration of the material. Compared to fossil fuels, formed from the degradation of prehistoric organic material, biomass formed in modern times at least releases no ancient carbon (as CO2) to the atmosphere. The renewable energy sector is rapidly becoming more feasible due to the increased threat to our planet of global warming caused by burning of fossil fuels.