Natural gas has been widely billed as a “bridge fuel” – a low-carbon alternative to coal that will help us make the transition to cleaner energy – but a new study pokes some big holes in that argument. According to the study, which was published last month in Environmental Review Letters, the amount of carbon in the atmosphere is already so great that switching to natural gas would do very little to counter current warming trends. However, the study shows that switching to renewable energy could begin to cut the warming effect within two decades.

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Post tags: alternative energy, carbon, carbon dioxide, Climate Change, CO2, coal power, fracking, global warming, hydroelectric, natural gas, nuclear power, renewable energy, solar

Instead of acting as one of the most bland parts of city landscapes, what if manholes served a purpose? That’s what designers Cheolyeon Jo and Youngsun Lee propose with their “Eco Sign“, an electronic manhole cover that gives directions to the closest train or bus stop.

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Post tags: bus, Electricity, green design, hydroelectric, kinetic energy, manhole, rainwater, renewable energy, sustainable design, train