In the Canary Islands, they have over 320 desalination plants that turn seawater into drinking water using a process called reverse osmosis. These plants contribute a lot of carbon dioxide to the air, more than should be allowed per person. To reduce this impact, replacing some parts in these plants every year by 20% can cut down carbon footprints by 5-6%. If they use low-energy membranes, it could be even better. Currently, these plants emit about 5.3 million tons of CO2 a year, which is too much for each person living there. Making these changes could help make these plants more energy efficient and less harmful to the environment.