Electric Boats

While battery-electric ferry boats may be more eco-friendly and require less maintenance than their diesel-burning counterparts, they're still not perfect. That's why scientists are now looking into powering small ferries using nothing but compressed air.

Clear Robotics is expanding its fleet of autonomous marine trash collectors. Its Class 3 vessel boasts more onboard storage capacity plus towed barge potential for extended cleanup operations, and has also been designed to tackle invasive weeds.