Born in 2017, The Great Bubble Barrier catches waste in rivers and canals to prevent it reaching the oceans. Animal and ship friendly, the solution involves a barrier of bubbles that push waste objects to the surface and along to the riverbeds, where they can be picked up and taken to recycling facilities. The barrier is a long, perforated tube that runs diagonally for 60 metres across the bottom of canals. The first Bubble Barrier was installed in November 2019 in a canal of Amsterdam, commissioned by the Regional Water Authority Amstel, Gooi and Vecht and the municipality of Amsterdam. Three of the founders are Dutch amateur sailors and friends, Anne Marieke Eveleens, Francis Zoet and Saskia Studer. They won the €500,000 Postcode Lotteries Green Challenge award to help kickstart the project.