what does renewable energy mean?
- 1 decade agoFavourite answer
Renewable energy effectively uses natural resources such as sunlight, wind, rain, tides and geothermal heat, which are naturally replenished. Renewable energy technologies range from solar power, wind power, hydroelectricity/micro hydro, biomass and biofuels for transportation.
In 2006, about 18 percent of global final energy consumption came from renewables, with 13% coming from traditional biomass, like wood-burning. Hydropower was the next largest renewable source, providing 3%, followed by hot water/heating which contributed 1.3%. Modern technologies, such as geothermal, wind, solar, and ocean energy together provided some 0.8% of final energy consumption. The technical potential for their use is very large, exceeding all other readily available sources.
Renewable energy technologies are sometimes criticised for being unreliable or unsightly, yet the market is growing for many forms of renewable energy. Wind power has a worldwide installed capacity of 74,223 MW and is widely used in several European countries and the USA. The manufacturing output of the photovoltaics industry reached more than 2,000 MW per year in 2006,and PV power plants are particularly popular in Germany. Solar thermal power stations operate in the USA and Spain, and the largest of these is the 354 MW SEGS power plant in the Mojave Desert. The world's largest geothermal power installation is The Geysers in California, with a rated capacity of 750 MW. Brazil has one of the largest renewable energy programs in the world, involving production of ethanol fuel from sugar cane, and ethanol now provides 18 percent of the country's automotive fuel. Ethanol fuel is also widely available in the USA.
While there are many large-scale renewable energy projects, renewable technologies are also suited to small off-grid applications, sometimes in rural and remote areas, where energy is often crucial in human development. Kenya has the world's highest household solar ownership rate with roughly 30,000 small (20–100 watt) solar power systems sold per year.
Climate change concerns coupled with high oil prices, peak oil and increasing government support are driving increasing renewable energy legislation, incentives and commercialization. European Union leaders reached an agreement in principle in March 2007 that 20 percent of their nations' energy should be produced from renewable fuels by 2020, as part of its drive to cut emissions of carbon dioxide, blamed in part for global warming. Investment capital flowing into renewable energy climbed from $80 billion in 2005 to a record $100 billion in 2006. This level of investment combined with continuing double digit percentage increases each year has moved what once was considered alternative energy to mainstream. Wind was the first to provide 1% of electricity, but solar is not far behind. Some very large corporations such as BP, General Electric, Sharp, and Royal Dutch Shell are investing in the renewable energy sector
- Anonymous4 years ago
What Does Renewable Energy MeanSource(s): https://shrink.im/a0AzG
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- 1 decade ago
Currently the most widely used form of energy is fossil fuels. These come from plants that got buried millions of years ago. Their biological material (hydrocarbons) collected over the years underground. It turns out that hydrocarbons burn very well so that's why they are used. However to get more fossil fuels, we'd have to wait millions of years more.
Renewable energy is pretty broad. It involves anything we can use that doesn't completely get used up. We can use it over and over again. This includes several things like solar power, fuel cells, hydroelectric power, geothermal power, wind energy and the like. Recently scientist have been developing a way to grow our own hydrocarbons. It turns out corn is an ok source of ethanol, a hydrocarbon-like compound. Sugar cane and switchgrass may be better to produce ethanol. We are already using ethanol in gas stations everywhere.
- Anonymous1 decade ago
Its the same as non-conventional energy.
From the word itself, it is the energy that can be renewed i.e. obtained and used. Examples: solar energy as you mentioned. Other examples are tidal energy, geothermal energy and many more.
A fact is that forests are also renewable sources of energy !
- Anonymous1 decade ago
solar energy means sun & sun is a never ending source.so it is called renewable energy.plants also are renewable energy.
- Anonymous6 years ago
There is a step-by-step video guide online right now that can show you how to reduce your power bill by making your own solar panels.
Take a look at it: http://tinyurl.com/Earth4EnergyRew
Why pay thousands of dollars for solar energy ($27,000 average cost) when you can build your own solar panel system for just a fraction of the retail cost. You can build a single solar panel or you can build an entire array of panels to power your whole house.
Some people are saving 50% on their power bill, some people are reducing their bill to nothing. But what’s most impressive is that just by following these instructions some are even making the power company pay them!
- 1 decade ago
After having good sex one eats lots of dry fruits and drinks fresh juice will make one's energy come back soon.. ie
- 1 decade ago
renewable energy means the energy which can be renewed.
it means it can be used again and again.