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Is This Stick Really a Wind Turbine?

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While wind turbines produce clean energy unlike dirty power plants that pollute out of sight, many people aren’t thrilled to see them dotting the landscape. Over the years, there have been many turbine designs that have yet to gain traction, notably vertical turbines.  Now, there’s a new design that takes it to the limit – turbines that look like sticks in the ground – with no blades at all. Does this new design look better to you?! No more worries about noise for people who live nearby. It has no moving parts and is therefore silent. It doesn’t have blades, so it can’t kill birds and bats. Prototypes are almost as efficient as conventional turbines and are markedly cheaper to build and maintain. “It will need less material, allowing us to provide electricity to more people at a lower cost, while leaving a smaller environmental footprint. It won’t kill birds and it won’t make noise. Stop imagining – here comes Vortex!,” says the developer, Spain-based Vortex Blades, on its crowdfunding page. Here’s how it works Instead of capturing energy by the rotating motion of turbine blades, Vortex takes advantage of “vorticity” – an aerodynamic effect that occurs when wind breaks against a solid structure. It begins to oscillate and captures the energy that is produced. It “floats” on magnets, which […]

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We're Edging Toward a Local, Organic Food Revolution

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by Rona Fried With years of extreme drought in California and the Midwest bread basket, we’re beginning to see how climate change can have a devastating impact on food supplies and prices. The silver lining is this could lead us to a more sustainable food system, one that relies on locally produced food and that doesn’t depend on transporting it huge distances (which would lower emissions). This isn’t pie in the sky – 80-100% of Americans’ food could be grown within 50-100 miles of our homes, concludes Elliott Campbell, a professor at University of California/Merced, in the study, "The Large Potential of Local Croplands to Meet Food Demand in the United States." Locally produced food isn’t new – we’ve seen an explosion in farmers markets and Community Supported Agriculture (CSAs) in recent years, and the USDA has been fostering local "food hubs," but there’s huge room for growth. 30% of New York City’s population could be fed from farms within 100 miles, as could half the people in the greater Los Angeles area, for example. The percentage goes up as people eat more plants and less meat. Compost collected from cities would fertilize the farms, obviating the need for petroleum-based […]

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