Maersk is testing a giant spinning cylinder to cut fuel use on cargo ships

# Maersk Tests Giant Spinning Cylinders to Cut Shipping Costs and Pollution Shipping giant Maersk is testing tall spinning cylinders on cargo ships that use wind to reduce fuel consumption, potentially saving up to 20 tons of fuel per day depending on weather conditions. As fuel prices for ships have skyrocketed—jumping as much as 76% in some areas—this technology offers a way to cut both costs and carbon emissions for an industry that's one of the world's biggest polluters. The spinning cylinders work like airplane wings, creating air pressure differences that naturally push ships forward, meaning less engine power needed.