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South Africa: Renewables Program Gains Momentum

Already the continent’s largest producer of renewable energy, South Africa is moving to further reduce its reliance on hydrocarbons by expanding private sector investments in solar and wind projects, and introducing biofuels. Under the Renewable Energy Power Producer’s Programme launched in 2011, the contribution of independent power producers (IPPs) to generation is expected to reach […]

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Solar energy to become cheaper than Eskom electricity in South Africa

While solar energy was currently cheaper than energy derived from diesel plants and generators that were often used as a substitute to conventional coal-fired power, it remained more expensive than coal-fired electricity generation. “This scenario is set to change,” said energy management consultancy firm PPA Energy South Africa executive director Graeme Chown.

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Eco roof generates solar energy, harvests rainwater

The rise in the cost of energy along with the need to reduce the carbon footprint of buildings, architects around the world have started to come up with buildings that either generate energy, save energy or try to conserve freshwater by harvesting rain. With such designs, the future of architecture definitely seems green, but buildings […]

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“World’s Greenest Office Building”

Seattle’s Bullitt Center is being heralded as the greenest, most energy-efficient commercial office building in the world. It’s not that the six-story, 50,000-square-foot building is utilizing never-before-seen technology. But it’s combining a lot of different existing technologies and methods to create a structure that’s a showpiece for green design–and a model for others to follow.

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Polymer film harvests energy from water vapour

MIT engineers have created a new polymer film that can generate electricity by drawing on a ubiquitous source: water vapour. The new material changes its shape after absorbing tiny amounts of evaporated water, allowing it to repeatedly curl up and down. Harnessing this continuous motion could drive robotic limbs or generate enough electricity to power […]

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How to make a solar water heater from plastic bottles

Retired mechanic Jose Alano invented a simple, cheap, energy saving rooftop solar water heater which is benefiting thousands of people. Here’s how it’s done… José Alano is a model of creativity in tackling environmental problems in Brazil. In 2002, the retired mechanic transformed a pile of plastic bottles and cartons into a solar water heater. […]

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Hydroelectricity – dams no longer required!

You don’t have to build dams to get hydroelectricity from water flowing through municipal pipes, says Dr. Daniel Farb, the Los Angeles immigrant who previously shook up the Israeli clean-tech power scene with his Leviathan Energy company’s award-winning Wind Tulip. The ecologically conscious physician recently unveiled his latest brainchild, a turbine that turns excess pressure inside […]

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Asian Water Scarcity Risked as Coal-Fired Power Embraced

Inner Mongolia’s rivers are feeding China’s coal industry, turning grasslands into desert. In India, thousands of farmers have protested diverting water to coal- fired power plants, some committing suicide. The struggle to control the world’s water is intensifying around energy supply. China and India alone plan to build $720 billion of coal-burning plants in two […]

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Nanotrees Harvest the Sun’s Energy to Turn Water Into Hydrogen Fuel

University of California, San Diego electrical engineers are building a forest of tiny nanowire trees in order to cleanly capture solar energy without using fossil fuels and harvest it for hydrogen fuel generation. Reporting in the journal Nanoscale, the team said nanowires, which are made from abundant natural materials like silicon and zinc oxide, also […]

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