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Wind power is now cheaper than nuclear – the energy revolution is happening

In March I went to see Henrik Poulsen, the boss of Dong Energy, in Copenhagen. Never heard of him or his company? You are not alone, but the chances are he is keeping your lights on. The largely unknown story of his company is worth telling because it is genuinely revolutionary. Dong stands for Danish oil […]

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How energy is hidden in colours—can we use it to power a renewable future?

‘Roses are red and violets are blue’ – so says the old poem. But why are roses red? And why are violets blue? What is it that gives something its colour? And how could playing with colour give us wearable solar panels? This last question is at the core of research being undertaken by Dr Wallace […]

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SolarCity’s Gigafactory

                A $750 million solar facility in Buffalo will produce a gigawatt of high-efficiency solar panels per year and make the technology far more attractive to homeowners. Availability: next year by Richard Martin In an industrial park near the shore of Lake Erie, hard by the Buffalo River, the […]

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Germany Runs Up Against the Limits of Renewables

At one point this month renewable energy sources briefly supplied close to 90 percent of the power on Germany’s electric grid. But that doesn’t mean the world’s fourth-largest economy is close to being run on zero-carbon electricity. In fact, Germany is giving the rest of the world a lesson in just how much can go […]

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Round-the-Clock Solar Power

A Promising Step Toward Round-the-Clock Solar Power A simple, cheap device turns sunlight into hydrogen fuel Solar power’s intermittency makes it problematic. Two electrodes submerged in water Solar power delivered to these electrodes allows them to produce hydrogen and oxygen from water. If solar power is to become a primary source of electricity around the […]

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