RENEWABLE ENERGY  

This is generally defined as  energy  that is collected from resources which are naturally replenished on a human timescale, such as sunlight, wind, rain, tides, waves, and geothermal heat. 


TIDAL ENERGY

Tidal energy  is a form of hydro-power that converts the energy of the tides into electricity or other useful forms of power. The tide is created by the gravitational effect of the sun and the moon on the earth causing cyclical movement of the seas. Tidal energy is therefore an entirely predictable form of renewable energy, which can be harnessed in two forms: Tidal Range and Tidal Stream



GEOTHERMAL ENERGY




Geothermal energy  is the heat from the Earth. It's clean and sustainable. Resources of geothermal energy  range from the shallow ground to hot water and hot rock found a few miles beneath the Earth's surface, and down even deeper to the extremely high temperatures of molten rock called magma.

WIND ENERGY



Wind Energy  is the use 
of air flow through  wind turbines to mechanically  power generators for electricity. 
Wind power , as an alternative to burning fossil fuels, is plentiful, renewable, widely distributed, clean, produces no greenhouse gas emissions during operation, uses no water, and 
uses little land. 




SOLAR ENERGY


Solar Energy  is  energy from the sun that is converted into thermal or electrical energy .  Solar energy  is the cleanest and most abundant renewable  energy  source available, and the U.S. has some of the richest  solar resources in the world. 




WAVE ENERGY


Wave Energy is the transport of  energy  by wind  waves , and the capture of that  energy to do useful work – for example, electricity generation, water desalination, or the pumping of water (into reservoirs). A machine able to exploit  wave  power is generally known as a  wave energy  converter (WEC). 



RAIN ENERGY


Rain energy is a fairly new method for generating energy.  Also see;

KINETIC ENERGY