Sail-powered cargo ships are making waves on the seas. High-tech versions of old tools are being installed on existing cargo ships in order to reduce fuel costs and help decarbonize the industry, which currently generates 3% of all human-created greenhouse gasses. Retrofitting cargo ships with sails could make maritime shipping greener and cheaper, and even change how the complicated shipping industry works. WSJ host Danny Lewis reports.

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Further reading:

Old-School Wind Power Is Back for Cargo Shipping 

Shipping Regulator to Steer Clear of Stricter Rules on Carbon Emissions 

Fertilizer Companies Are Betting on Ammonia as a Low-Carbon Fuel 

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