I can’t believe I’m typing this: two pilots just completed a 24,584 mile-long trip around the world in a plane over the course of more than a year, without a single drop of fuel. Bertrand Piccard and André Borschberg flew the Solar Impulse 2 across Europe, North America and Asia over the past year; the final leg of their trip took them from Cairo to Abu Dhabi in two days and 37 minutes, signaling the end of an incredible journey that the Swiss duo undertook to prove that clean technologies can power our future energy needs on earth. The Solar…

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