Drones join the climb to save Everest

Drones join the climb to save Everest

Mount Everest. Mário Simoes/CC BY 2.0 Human waste, empty oxygen cylinders, kitchen leftovers and discarded ladders. Sherpas working on Mount Everest carry all that and more — 20kg/person — navigating a four-hour hike that traverses crumbling glacial ice and treacherous crevasses to bring trash back to base camp. During the most recent climbing season, they…

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Big-box stores could help slash emissions and save millions by installing solar panels on their roofs. So why aren’t more of them doing it?

Big-box stores could help slash emissions and save millions by installing solar panels on their roofs. So why aren’t more of them doing it?

CNN  —  As the US attempts to wean itself off its heavy reliance on fossil fuels and shift to cleaner energy sources, many experts are eyeing a promising solution: your neighborhood big-box stores and shopping malls. The rooftops and parking lot space available at retail giants like Walmart, Target and Costco is massive. And these…

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