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This week's news is all green: green energy and green walls. And the odd chocolate egg - or 90 million the UK will consume this weekend - thrown in because it is Easter.
Smartphones could soon be powered by the product of anaerobic digestion (AD) of food waste, thanks to a new European research and development project.
Nearly three-quarters of the world's biggest palm-oil users have improved their commitment to sustainable sourcing in the past year, but fast-food brands are evidently lagging behind.
Innovation and improvements to grid connections could make onshore wind the most cost-effective new electricity source by 2020, according to the Onshore Wind Cost Reduction Taskforce.
Emissions from 10,000 of Europe's most polluting power stations and factories have fallen by more than 4%, according to figures released on Wednesday.
China is set to tackle its heavily-polluted water supplies by enforcing polluting industries to treat discharged water.
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