You might have heard of people doing a traditional beach clean up, but what about all the rubbish underwater?
A group of divers from voluntary organisation Seasearch have started carrying special bags to allow them to collect littler from the seabed.
Seasearch is primarily concerned with making a record of the wildlife and other characteristics of the water in which they dive.
We went along to a special underwater clean up at Brompton beach in Bangor, County Down, to find out more.
Video journalist: Erinn Kerr