SOURCES OF ENERGY

           

           Nuclear power is a type of nuclear technology involving the controlled use of nuclear reactions to release energy for work, including propulsion, heat, and the generation of electricity. Nuclear energy is produced by a controlled nuclear chain reaction and creates heat—which is used to boil water, produce steam, and drive a steam turbine. The turbine can be used for mechanical work and also to generate electricity.

            The use of nuclear power has also engendered much debate. Critics claim that nuclear power is a potentially dangerous energy source with a limited fuel supply (compared to renewable energy), and they note the problems of storing radioactive waste, the potential for radioactive contamination by accident or sabotage, and the possibility of nuclear proliferation. Advocates claim that these risks are small and can be further reduced by the technology in new reactors, and the safety record is good when compared to other major types of power plants. In addition, they note that many renewable energy technologies have not solved the problem of their intermittent power production.

LEARN MORE: https://www.wisegeek.com/what-is-nuclear-power.htm

 SOLAR POWER

Solar power is the conversion of energy from sunlight into electricity, either directly using photovoltaics (PV), indirectly using concentrated solar power, or a combination. Concentrated solar power systems use lenses or mirrors and tracking systems to focus a large area of sunlight into a small beam. Photovoltaic cells convert light into an electric current using the photovoltaic effect.

https://www.nationalgeographic.com/environment/global-warming/solar-power/ 

WIND POWER

WATER POWER= TIDAL POWER , WAVE POWER

        Tidal power, sometimes called tidal energy, is a form of hydropower that exploits the rise and fall in sea levels due to the tides, or the movement of water caused by the tidal flow. Because the tidal forces are caused by interaction between the gravity of the Earth, Moon, and Sun, tidal power is essentially inexhaustible and classified as a renewable energy source. In fact though, the ultimate energy source is the rotational energy of the Earth, which will not run out in the next four billion years, although the Earth's oceans may boil away in two billion years.

         Although not yet widely used, tidal power has great potential for future electricity generation and is more predictable than wind energy and solar power. In Europe, tide mills have been used for nearly a thousand years, mainly for grinding grains.

Tidal power can be classified into two types:

• Tidal stream systems make use of the kinetic energy from the moving water currents to power turbines, in a similar way to underwater wind turbines. This method is gaining in popularity because of the lower ecological impact compared to the second type of system, the barrage.
• Barrages make use of the potential energy from the difference in height (or head) between high and low tides, and their use is better established. These suffer from the dual problems of very high civil infrastructure costs and environmental issues.

LEARN MORE: https://www.britannica.com/science/wave-power