Cargo ships are finding that using sails allows them to reduce fuel usage by *one third*. Only 30 of the world's 60,000 cargo ships are wind-assisted right now, but it appears that the entire industry has just figured out that it would be foolish *not* to put sails on their ships. The potential reduction in emissions—CO2 and otherwise—would serve as a significant reduction in the rate of climate change. https://www.nytimes.com/2023/10/03/climate/wind-powered-ships-climate.html