Shipping is not a clean business. The global economy is fueled by trade, and much of that trade involves hauling product from point A to point B. A great deal of that product goes by water. Shipping it around uses a great deal of fuel, and creates a great deal of greenhouse gas emissions. It’s bad for the environment, and it’s costly for shipping companies.
This is a companion discussion topic for the original entry at https://hackaday.com/2024/04/02/giant-sails-actually-help-cargo-ships-save-fuel-and-the-planet-in-turn/