Sail-powered cargo ships

Some companies are returning to an old concept, sail-powered cargo ships, to reduce the amount of carbon used to ship goods across the ocean.

From PBS NewsHour: “Eighty percent of all global trade travels by sea, and the ships carrying those goods account for 3 percent of global greenhouse gas emissions. Now, some shipping companies are taking a new tack as they try to navigate the industry to sustainability on the high seas.”