This is the best summary I could come up with:

Enabling a vessel to be blown along by the wind, rather than rely solely on its engine, could hopefully eventually reduce a cargo ship's lifetime emissions by 30%.

It was developed by UK firm BAR Technologies, which was spun out of Sir Ben Ainslie's 2017 America's Cup team, a competition sometimes called the 'Formula One of the seas'.

"This is one of the most slow-moving projects we've done, but without doubt with the biggest impact for the planet," its head John Cooper - who used to work for Formula One team McLaren - told the BBC.

Experts say wind power is a promising area to explore, as the shipping industry tries to reduce the estimated 837 million tonnes of CO2 it produces each year.

"Wind power can make a big difference," says Dr Simon Bullock, shipping researcher at the Tyndall Centre, at the University of Manchester.

He said new cleaner fuels will take time to emerge "so we have to throw everything at operational measures on existing ships - like retrofitting vessels with sails, kites and rotors".

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