Most renewable energy comes either directly or indirectly from the sun. Sunlight, or solar energy, can be used directly for heating and lighting homes and other buildings, for generating electricity, and for hot water heating, solar cooling, and a variety of commercial and industrial uses. Renewble Energy - Solar PV
The sun's heat also drives the winds, whose energy, is captured with wind turbines. Then, the winds and the sun's heat cause water to evaporate. When this water vapor turns into rain or snow and flows downhill into rivers or streams, its energy can 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 fuels, or chemicals. The use of biomass for any of these purposes is called bioenergy.
Hydrogen also can 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's always combined with other elements, such as with oxygen to make water. Once separated from another element, hydrogen can be burned 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 of buildings. And the energy of the ocean's tides come from the gravitational pull of the moon and the sun upon the Earth.
In fact, ocean energy comes from a number of sources. In addition to tidal energy, there's the energy of the 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.
Why is renewable energy important?
Environmental Benefits Well, this is not only a benefit but a fact that has developed the need of a renewable energy system.This will help the Earth to regain back its lost power and there will be more greenery, more healthy living space and eventually pollution could be eliminated. However, this seems like a far fetched dream as not many governments are motivated enough to take on this step.
Infinite Energy Resources Renewable energy is infinite. Whether it is of the sun, of the ocean or of the internal depths of the Earth, it is infinite. For generations and generations to come, renewable energy will be able to provide a safe, clean and healthy environment for people to live. With the constant advancement in technology, renewable energy will one day replace the will be depleted underground fossil energy.
Employment Resources Thousands of people will be provided with employment resources as renewable energy requires manpower and workman ship to build and maintain facilities. Renewable energy can also promote economy of countries when they will export and import equipments to each other. It will become a massive investment and a huge industry, a much larger scale than the current fossil fuel economy.
No More Oil WARS The oil and fossil energy has not only disrupted the planet, but it has also disrupted the relation between countries, where wars are being fought over oil rights. This is not at all a peaceful endeavor and implementation of renewable energy could be changing all that. No more will there be conflicts over oil rights, but everyone will be using the natural resources for their own energy process.
Conclusion If only political matters are settled and countries really take on massive responsibility of renewable energy, then we could possibly have a wonderful world to live and breathe in by the next 50 years.