Small electric workboats, born in a Hong Kong university lab and now built and run from Bengaluru, that pull plastic, temple offerings and invasive weed out of India's ports, rivers and lakes.
A Navarra-founded company that coats native tree seeds in a protective capsule and fires them from drones over burned hillsides, promising fast, cheap reforestation that scientists say still needs proof.
A battery-powered aquatic drone, about the size of a small car bonnet, that swims into dock corners and canal edges to scoop up bottles, bags and weed before they drift out to sea.
A boat-piloted robot that hops along the seabed injecting seagrass seeds into the sediment, built to turn a slow job for divers into one that can cover whole meadows.
A quiet, all-electric beach robot from eastern France that combs the top 10 cm of sand for cigarette butts, bottle caps and plastic shards that rakes and volunteers miss.
