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Renewable energy

Renewable energy
Renewable energy is generally defined as energy that comes from resources which are naturally replenished on a human timescale such as sunlight, wind, rain, tides, waves and geothermal heat.[2] Renewable energy replaces conventional fuels in four distinct areas: electricity generation, hot water/space heating, motor fuels, and rural (off-grid) energy services.[3] About 16% of global final energy consumption presently comes from renewable resources, with 10% [4] 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) account for another 3% and are growing rapidly.[5] At the national level, at least 30 nations around the world already have renewable energy contributing more than 20% of energy supply. Renewable energy resources exist over wide geographical areas, in contrast to other energy sources, which are concentrated in a limited number of countries. Overview

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Blog » Clarity on the true cost of electricity The question of electricity cost is tricky. Most of us know oil prices go up and down – and are currently at record highs – which in turn affects the power price. And we know that not only to the costs of importing such fuels change constantly, they also – unlike renewables – produce carbon, which has to be paid for. But while more and more people are saying onshore wind energy is at “competitive” price levels, others still insist that renewables are expensive and impractical.

MIT : Grass Solar Power A researcher at MIT, Andreas Mershin, has created solar panels from agricultural waste such as cut grass and dead leaves. In a few years, Mershin says it’ll be possible to stir some grass clippings into a bag of cheap chemicals, paint the mixture on your roof, and immediately start producing electricity. If you remember high school biology classes, you will hopefully remember a process called photosynthesis, whereby plants turn sunlight into energy. Mershin has found a process which extracts the photosynthesizing molecules, called photosystem I, from plant matter. Photosystem I contains chlorophyll, the protein that actually converts photons into a flow of electrons.

Flapper A flapper onboard ship (1929) Flappers were a "new breed" of young Western women in the 1920s who wore short skirts, bobbed their hair, listened to jazz, and flaunted their disdain for what was then considered acceptable behavior. Flappers were seen as brash for wearing excessive makeup, drinking, treating sex in a casual manner, smoking, driving automobiles, and otherwise flouting social and sexual norms.[1] Flappers had their origins in the liberal period of the Roaring Twenties, the social, political turbulence and increased transatlantic cultural exchange that followed the end of World War I, as well as the export of American jazz culture to Europe. Etymology[edit]

Carbon-taxed companies cut emissions by 7% in past year, investor group says Greenhouse emissions from Australian companies paying the carbon tax have fallen by 7% over the past year “in large part” due to the carbon price impost, the Investor Group on Climate Change has said. Calculations by the group of official data from the Clean Energy Regulator shows carbon emissions from Australia’s 350 largest corporate emitters – who are directly liable to pay the tax – fell from 342m tonnes in 2011-12 to 321m tonnes in 2012-13. The group’s chief executive, Nathan Fabian, said he believed the carbon tax was “the major contributor” to the decrease in emissions, although other factors did play a role, including the shutdown of some large electricity generators because of weather events and the closure of some major manufacturing operations.

Pavegen, Former ID Student's Electricity-Generating Floor Tile, Gaining Traction Several years ago, British entrepreneur Laurence Kemball-Cook built his first Pavegen electricity generating prototype while studying Industrial Design & Technology at Loughborough University. The Pavegen is a floor tile, similar in concept to (though developed independently of) the Sustainable Dance Floor from the Netherlands. Like that product, it captures electricity generated by footfalls, making it an ideal way to generate power from nothing more than people walking over it. In December of last year the Pavegen began real-world trials at a grammar school in Kent, and now Kemball-Cook has received his first commercial order for the system: The new Westfield Stratford City Shopping Centre in East London plans to roll out a grid of Pavegens to power the lighting. "30 million shoppers a year = great for Pavegen!" tweeted an exuberant Kemball-Cook on the mall's opening day. With tops surfaced in 100% recycled truck tires, the Pavegens are designed to withstand outdoor punishment.

Renewable Energy Used to Make Drinking Water From Air Humidity – Blue Living Ideas Availability Published on June 18th, 2009 | by Jennifer Lance Scientists have discovered a way to make drinking water from the air’s humidity, even in arid regions. The system completely uses renewable energy and could provide water for many applications. Models have been built and tested in laboratories at the Fraunhofer Institute for Interfacial Engineering and Biotechnology IGB in Stuttgart. BMW Hydrogen 7 - Hydrogen Motors I do not remember going to an auto show in Germany without seeing a prototype BMW hydrogen. For more than 30 years to work on hydrogen at the Munich manufacturer, and whenever I asked the question (and I asked each time), I responded that soon, cars would be available to customers. But over the past 3 years, I had felt that things accelerated, and I think it was in 2004 that told me that there would be a hydrogen version of the current generation of Round 7.

Jazz Age The Jazz Age was a feature of the 1920s (ending with The Great Depression) when jazz music and dance became popular. This occurred particularly in the United States, but also in Britain, France and elsewhere. Jazz played a significant part in wider cultural changes during the period, and its influence on pop culture continued long afterwards. Jazz music originated mainly in New Orleans, and is/was a fusion of African and European music. The Jazz Age is often referred to in conjunction with the phenomenon referred to as the Roaring Twenties. The term "Jazz Age" was coined by F.

Renewable energy in Germany Biogas fermenter, wind turbine and photovoltaics on a farm in Horstedt, Schleswig-Holstein Renewable electric power produced in 2011 by energy source Germany's renewable energy sector is among the most innovative and successful worldwide. Electricity Generating Dance Floors and Other Miracles of Piezoelectricity - Technology Even if the planet doubled the amount of solar and wind power available tomorrow, there would still be a shortage of clean electricity. We need to grab energy from wherever we can find it, which is why piezoelectricity—the charge that gathers in solid materials like crystal and ceramic in response to strain—has recently begun to pique the interest of entrepreneurs and scientists alike. A number of materials are piezoelectric, including topaz, quartz, cane sugar, and tourmaline.

Intermittent energy source An intermittent energy source is any source of energy that is not continuously available due to some factor outside direct control. The intermittent source may be quite predictable, for example, tidal power, but cannot be dispatched to meet the demand of a power system. Effective use of intermittent sources in an electric power grid usually relies on using the intermittent sources to displace fuel that would otherwise be consumed by non-renewable power stations, or by storing energy in the form of renewable pumped storage, compressed air or ice, for use when needed, or as electrode heating for district heating schemes. The use of small amounts of intermittent power has little effect on grid operations. Using larger amounts of intermittent power may require upgrades or even a redesign of the grid infrastructure.[8][9] Terminology[edit]

Fuel cell Demonstration model of a direct-methanol fuel cell. The actual fuel cell stack is the layered cube shape in the center of the image Scheme of a proton-conducting fuel cell The first fuel cells were invented in 1838. The first commercial use of fuel cells came more than a century later in NASA space programs to generate power for probes, satellites and space capsules. Mental breakdown Definition[edit] The terms "nervous breakdown" and "mental breakdown" have not been formally defined through a medical diagnostic system such as the DSM-IV or ICD-10, and are nearly absent from current scientific literature regarding mental illness.[1][2] Although "nervous breakdown" does not necessarily have a rigorous or static definition, surveys of laypersons suggest that the term refers to a specific acute time-limited reactive disorder, involving symptoms such as anxiety or depression, usually precipitated by external stressors.[1] Specific cases are sometimes described as a "breakdown" only after a person becomes unable to function in day-to-day life.[3] Controversy[edit]

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