The shipping industry produces 2.9 percent of global carbon dioxide emissions, matching the entire continent of South America. The industry’s greenhouse-gas emissions have increased 10 percent in the last six years. Right now, about 40 companies are developing wind-propulsion technologies for large container vessels. Companies from Britain, France, China, and Japan are all involved. Fifteen large wind-assisted ships are already on the water. More than 20 are in late-stage prototypes. A 200-ton dry-bulk vessel kitted up with three 164-foot sails could save around $1.5 million in fuel costs per year. A larger ore carrier, with five sails, could save about $2.5 million. If only they could unclog the ongoing supply chain logjam…
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