Wed, 04/19/2023 - 15:18 Tech Insider Technology .Sharrow Marine makes a propeller based on loops that's designed to reduce noise and increase efficiency.Sharrow Marine Tags Science, Technology, One Planet, Gains in Green Tech, Shipping, Oceans, Marine Life, whales, ships, propeller, Drones, noise pollution, Special Projects, Sustainability, climate tech, op-featured, op-2 Source New propellers with looped blades could help make the oceans quiet again, spariā¦