david alexandra was reporting now. this is down to ocean warming and industrial one of let's start with the warming presumably. then this is all set to get much worse. and that would seem to be the case fido plankton which make up the algae are basically just plants in the ocean. and of course, plants grow when there's more sunlight and they grow when the water is warmer, and they grow when they have more nutrients, nitrogen and phosphorus. so the nitrogen phosphorus, arguably coming from run off and fertilizers on land. and the warming coming from carbon dioxide in the atmosphere. well, the run off that we've been pumping that into water systems for years. is there a way to try to curb the effects of what's already in the water system? yes, so once the pollutants are in the water, they have a very long residence time, so it's not so easy to remove them that's building up in the background. and of course the temperatures you may have heard that this year 2023 is set a record for the global temperature, not only the sur