Renewable Energy

What is renewable energy?

Most renewable Energy comes euther directly or indirectly from the sun.Sunlight, or solar energy, can be used directly for heating and lighting homes and orther buildings, for generating electricity and hot water heating, solar cooling and variety of commercial and industrial uses.

The sun's heat also drives the winds, whose energy is captuerd with wind turbines. Then the winds and sun's heat cause water to evaporate. When this water vapour turns into rain or snow and flows downhill into rivers or streams, its energycan be captured using hydroelectric power. Along with the rain and snow, sunlight causes plants to grow. The organic matter that makes up those plants is known as biomass. Biomass can be used to produce electricity , transportation flues, or chemicals. The use of biomass for any of these purposes is called biomass energy.

Hydrogen can also be found in many organic compounds, as well as water. It's the most abundant element on the Earth, but it doesn't occur naturally as a gas: it is always combined with other elements, such as oxygen to make water. Once separated from another element, hydrogen can be used as a fuel or converted into electricity.

Not all renewable energy resources come from the sun. Geothermal energy taps the earth's internal heat for a variety of uses, including electric power production, and the heating and cooling for buildings. And the energy of the ocean's tides comes from the gravitational pull of the moon and the sun upon the earth.

In fact, an ocean's energy comes from a number of sources. In additional to tidal energy , there is the energy of ocean's waves , which are driven by both the tides and the winds. The sun also warms the surface of the ocean more than the ocean depths, creating a temperature difference that can be used as an energy source. All these forms of ocean energy can be used to produce electricity.

Aragri , Fiore I A L.S.P.P.