Israel’s BlueGreen Water Technologies (see here previously) removed algae from the Mantua Reservoir in Utah, USA, equating to nearly 13,000 tonnes of atmospheric CO2. It marked the world’s first-ever verified removal of CO2 by eradicating harmful algal blooms in freshwater.

https://www.ourcrowd.com/startup-news/global-climate-breakthrough-bluegreen-water-technologies-removes-13000-tonnes-of-co2-from-u-s-freshwater-body