. >> anne marieke eveleens is behind a start-up, the great bubble barrier, and its innovative technology here is how it works -- a tube is laid across the bed of a waterway. air is pumumped out of holes along it. the bubbles drive trash in the water to the surface, , towars the bank and into a receptacle. , tests have shown that on average 86% of trash in the water can be collected this way. the garbage that ends up in the container is removed three times a week. for now, only one bubble barrier has s been installed n amsterdam. it's a pilot project, but the potential both in the city and worldwide is enormous. >> i have multiple sectors that have interest in this, for example. you can imagine that companies that have a benefit of tourists coming by, they want beaches that are clean, they want river sites that are clean. they want to have terraces where you can sit on nicely. and on the moment you install such a system, you can you can make it clean and make sure that it looks nice to visit agaiain. >> the fm has received financial support from the government. it's also woworking on ways