Sails make a comeback as shipping tries to go green

As the shipping industry faces pressure to cut climate-altering greenhouse gases, one answer is blowing in the wind. European and U.S. tech companies, including one backed by aeroplane maker Airbus, are pitching futuristic sails to help cargo ships harness the free and endless supply of wind power. While they sometimes don’t even look like sails — some are shaped like spinning columns — they represent a cheap and reliable way to reduce CO2 emissions for an industry that depends on a particularly dirty form of fossil fuels.

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