Environment Technology

Environment Technology

Renewable Energy

Posted by admin on October 9, 2013 in Renewable Energy with 1 Comment

Renewable Energy is energy that comes from resources which are continually replenished such as sunlight, wind, rain, tides, waves and geothermal heat. About 16% of global final energy consumption comes from renewable resources, with 10% of all energy from traditional biomass, mainly used for heating, and 3.4% from hydroelectricity. New renewables (small hydro, modern biomass, wind, solar, geothermal, and biofuels) accounted for another 3% and are growing very rapidly.[2] The share of renewables in electricity generation is around 19%, with 16% of electricity coming from hydroelectricity and 3% from new renewables.[2]

Wind power is growing at the rate of 30% annually, with a worldwide installed capacity of 282,482 megawatts (MW) at the end of 2012, and is widely used in Europe, Asia, and the United States. At the end of 2012 the photovoltaic (PV) capacity worldwide was 100,000 MW, and PV power stations are popular in Germany and Italy. 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% of the country’s automotive fuel. Ethanol fuel is also widely available in the USA.

While many renewable energy projects are large-scale, renewable technologies are also suited to rural and remote areas, where energy is often crucial in human development.[3] As of 2011, small solar PV systems provide electricity to a few million households, and micro-hydro configured into mini-grids serves many more. Over 44 million households use biogas made in household-scale digesters for lighting and/or cooking, and more than 166 million households rely on a new generation of more-efficient biomass cookstoves.[4] United Nations’ Secretary-General Ban Ki-moon has said that renewable energy has the ability to lift the poorest nations to new levels of prosperity.[5]

Climate change concerns, coupled with high oil prices, peak oil, and increasing government support, are driving increasing renewable energy legislation, incentives and commercialization.[6] New government spending, regulation and policies helped the industry weather the global financial crisis better than many other sectors.[7] According to a 2011 projection by the International Energy Agency, solar power generators may produce most of the world’s electricity within 50 years, dramatically reducing the emissions of greenhouse gases that harm the environment.

Duration : 0:44:41

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  1. eggspgOctober 9, 2013 - 7:20 am #1

    When we are talking …
    When we are talking about the resources of the renewable, I completely agree, we have to use all the resources, but same time, we should not forget how to mitigate the climate. And that is the challenging part is there: now, coming to the developing economy, the biggest challenge is the resources of the finance and money, where to come.

  2. Glenn HoughOctober 9, 2013 - 7:20 am #2

    So what do you …
    So what do you suggest is the best thing to do when now that fossil fuel, nuclear plant and coil plants are not renewable and eventually will burn out sooner or later and it cause more CO2 build up… if we don’t find a way to find alternative source of energy the future will be no more..

  3. hawkeye0248October 9, 2013 - 7:20 am #3

    My biggest concern …
    My biggest concern with windmills is 1: Those more powerful units that are able to drive an electrical stove, air conditioner, kettle, etc are too big for private homes in cities. 2. Windmills are very sensitive to windspeed and ice buildup may throw them off balance, thus making them not available 24/7. I would most certainly like to reduce my electricity bill and has already installed a solar geyser, but still feel that wind or photovoltaics is not suitable for me.

  4. hawkeye0248October 9, 2013 - 7:20 am #4

    Solar cells are NOT …
    Solar cells are NOT renewable. 1. What happens when Fedex has to work overtime? i.e. work during the night. Where is the electricity then coming from? … ah, the trusted and 24/7 coal fired or nuclear plant. 2. Not many knows this, but more CO2 is released during the production of a silicon solar cell than the amount of carbon that cell will save during its lifetime. Photovoltaics in space works well because it operates 24/7.

  5. Louis CalvezOctober 9, 2013 - 7:20 am #5

    So what about the …
    So what about the entropy from conversion of “renewable energy”? As long as that entropy is not considered to be be “pollution” then we are free to extract and convert more and more energy and so degrade more and more energy?

    The extraction and conversion of energy can be less efficient as the demand for energy increases, the complexity of management increases, and the costs of dumping degraded energy increases; but society can stil prosper?

    Politics is a denial of thermodynamics and ecology.

  6. fjord407October 9, 2013 - 7:20 am #6


  7. orrin clerkOctober 9, 2013 - 7:20 am #7

    check out my cool …
    check out my cool free energy videos dist put my name on top and search

  8. Calixto CabreraOctober 9, 2013 - 7:20 am #8

    The capacity for …
    The capacity for vigorous activity…

  9. blackrhino3October 9, 2013 - 7:20 am #9

    best video everrrr 
    best video everrrr 

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