Renewable Energy

William asks…

what is the importance of renewable energy?

SCIECE HOMEWORK!

Windmill Farms answers:

Environmental Benefits

Renewable energy technologies are clean sources of energy that have a much lower environmental impact than conventional energy technologies.

Energy for our children’s children’s children

Renewable energy will not run out. Ever. Other sources of energy are finite and will some day be depleted.

Jobs and the Economy

Most renewable energy investments are spent on materials and workmanship to build and maintain the facilities, rather than on costly energy imports. Renewable energy investments are usually spent within the United States, frequently in the same state, and often in the same town. This means your energy dollars stay home to create jobs and fuel local economies, rather than going overseas.

Meanwhile, renewable energy technologies developed and built in the United States are being sold overseas, providing a boost to the U.S. Trade deficit.

Energy Security

After the oil supply disruptions of the early 1970s, our nation has increased its dependence on foreign oil supplies instead of decreasing it. This increased dependence impacts more than just our national energy policy.

Lizzie asks…

distinguish between renewable and non- renewable energy?

Windmill Farms answers:

Renewable energy will not be used up.Renewable energy sources include wind energy,solar energy.
Non-renewable energy will be used up some day.

Donald asks…

If energy can’t be created, what’s renewable energy?

All over the internet it says how energy can’t be made, only transformed.

So where does the sun’s thermal energy, the tidal energy, the light energy and all the other forms of RENEWABLE energy come from in the first place, if it’s renewable?

Windmill Farms answers:

Renewable energy is just a name for an energy that comes from renewable sources. Renewable sources are the ones that replenish naturally such as sunlight, or wind, etc; and unlike oil (although it actually does replenish itself, it is over millions and millions of years so it really isn’t worth taking into account) or coal.

The solar energy and the tidal forces come from one of the 4 basic laws of nature, gravity. The energy source for gravity is theorized to be gauge bosons called gravitons through which gravity interacts with rolled up dimensions, but that is beyond this question; the basic idea of gravity is that mass attracts mass but I’m drifting away from the original question. If you still want to know, this gauge bosons simply come into existence for very brief instances of time creating the force and therefore the energy (work (energy)= force x displacement).

Chris asks…

Why should we switch to renewable energy?

My essay topic is on green energy, I can’t seem to think of an ethical reasons to why we should make the switch.
What are some reasons(ethical, logical,and emotional) to why we should switch to renewable/green/efficient energy?

Windmill Farms answers:

We should swtich to renewable energies – a wise combination of solar, wind, and water power because renewables are:
A) sustainable – energy that wont deplete (= energy security / the end of the power struggle)
B) Doesn’t cost the earth to acquire
(EG. There’s no drilling into the Earth’s core…)
C) Once equipment is paid for, the energy is FREE.
(Ah! Freedom from bills!)
D) It is truly SAFE
E) It is CLEAN / non-polluting (no carbon emissions!)
F) NO power cuts! (With adverse weather / global warming, no risk, or threat, of having no power)
G) Homes that have handy energy generation kits installed, become self-sufficient / don’t have to rely on the national grid
(which needs replacing at huge expense) (if that money was saved and spent on fitting devices in every building – WOW!)

(= Energy Security)

Joseph asks…

what does renewable energy mean?

solar energy

Windmill Farms answers:

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

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