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What is renewable energy ? Where do they come from? Published on 21 March 2016. Renewable energies are created from sources of natural and ecological energies such as sun, wind, water, tide or organic matter. These energies come from natural phenomena, regular or constant, which make them inexhaustible. They are also sometimes referred to as "green" or "clean" energies because they emit less CO2 than fossil energy sources. Today, the various governments seek to increase the share of renewable energy in the energy market in order to fight for the preservation of the environment. Discover the offer of Planète YES   There are five main sources of renewable energy : Hydraulic energy It is the most used renewable energy, accounting for 13% of electricity production in France and 19% in the world. This energy is provided by the movement of water, in different forms: fall, marine current, tide, ... The movement of the water can be used directly as for example with wate

Can nuclear energy be considered a renewable energy ? The answer is no: uranium, used today for fission, remains a fossil and limited resource. Nevertheless, if man managed to control fusion, the situation could change ... Nuclear waste produced would also be less important. It is sometimes wondered whether the energy produced by nuclear power plants is fossil energy or renewable energy . Uranium, a fossil resource At present, nuclear power plants operate on the principle of nuclear fission and use uranium as fuel. However, this uranium, whose isotope 235U is the only fissile natural isotope, is formed only during supernovae. On Earth, uranium is therefore a fossil and limited resource. If uranium is a relatively abundant element on the planet (more than gold), its low concentration makes it economically difficult to exploit. According to the Nuclear Energy Agency (NEA), uranium reserves could supply power to nuclear power plants in the world for a century, under current operating cond

The energies that nature constitutes or reconstitutes faster than humans use them are classified in the category of renewable energies. They can thus be considered as inexhaustible on the scale of human time. Advantages of renewable energies compared to fossil fuels In contrast, energy sources whose renewal is slower than their consumption, as is the case today with oil, do not fall under the category of renewable energies. They are called fossil fuels. Another advantage of the renewable energies on these fossil energies is their decarbonity. Indeed, renewable energies do not produce carbon dioxide (CO2) and their development can therefore help us to fight against global warming by reducing greenhouse gas emissions. On the other hand, the energy power of renewable energies is relatively disseminated. These energies can be intermittent. This is the case for solar and wind power. Storage solutions, which are not always obvious, must then be found. See also: Is nuclear energy fossil or re

Renewable energies (Renewable energies) are sources of energy whose natural renewal is fast enough so that they can be considered inexhaustible on the scale of human time. They come from natural cyclical or constant phenomena induced by the stars (Sun especially for heat and light), but also the Moon (tide) and the Earth (geothermal). Its renewability depends, on the one hand, on the rate at which the source is consumed and on the other hand on the rate at which it regenerates. The term " renewable energy " is the short and common form of the terms " renewable energy sources" or "renewable energies" that are more physically correct. The share of renewable energies in the final global energy consumption in 2014 was estimated at 19.2%, of which 14% was biomass, and their share in electricity production at the end of 2015 was estimated at 23.7%: 16.6% hydro, 3.7% wind, 2.0% biomass, 1.2% photovoltaic and 0.4% various (geothermal, solar thermodynamic, marine