Too much renewable power? A German engineer comes up with a way to store excess renewable energy, take pressure off the grid and ease the way for the adoption of more wind and solar power in a country that's already way ahead of most of the rest of us.
Unhappy with the economics of his rooftop solar panels, a German tinkerer invents his own electricity storage system that saves users hundres of dollars a year, makes it easier to integrate renewables into the grid, and wins an award for renewable product of the year.
Brazilians are notoriously lavish bathers, taking as many as three showers a day. But as the country faces a major drought, they're trying to find way to keep up the shower numbers while still saving water.
The unprecedented water crisis in South America's largest city is leading citizens to change everything, from how they use water to how they engage with politics. But while the government is taking action, residents say it's not nearly enough.
São Paulo is facing an unprecedented water crisis that many saw coming, but no one did much to prevent. And with reservoirs hovering near 10% of capacity, many residents are turning to unhealthy stopgaps and worrying about unrest.
There may be a counterintuitive explanation for the deep freeze that hit New England this winter: The rapidly warming Arctic is causing big disruptions in the jet stream, which carries weather across North America. Is this the worst winter you've experienced?
After scoring some big victories in the US in 2014, the movement to get institutions to cut their ties to fossil fuel companies is broadening its focus in the UK to include big name museums and even toy companies.
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