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Carbon Crossroads: Can Germany Revive Its Stalled Energy Transition?
A broad spectrum of experts is working to revitalize Germany's faltering clean-energy transformation
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Flatrock Passive: A Winter Update
An investment in a root cellar and gardening pays off, but solving an indoor air quality problem proves difficult
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Efficiency Is Still the Best Energy Deal
Renewables are getting cheaper but energy efficiency, on average, still costs utilities less
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Help for Thirsty Cities
Three promising technologies could help cities capture and reuse stormwater — if we can find a way to clean it up
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What Is ‘Green’ Dry Cleaning?
Most dry cleaners use perchloroethylene, a probable human carcinogen, but an industry shift may be ahead
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Saving Sustainably: Plumbing Rough-In
PEX supply lines speed up installation and lower the risk of frost damage
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The Fine Print on Energy Efficiency
More efficient appliances cut energy consumption, but behavioral differences among consumers are the key to savings
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Statistic of the Year: 90.5 Percent
If you recycled all the plastic garbage in the world, you could buy the NFL, Apple, and Microsoft
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Climate Change Resilience Could Save Trillions
But finding the billions we need now to pay for it is the hard part
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The Promise and Unknowns of Hyperloop Transportation
With launch anticipated as early as the 2020s, promoters are taking a closer look at what the technology means for climate, ecosystems, and mineral resources