How to clean the world's beaches in two minutes
Every time Martin Dorey visited one of his local beaches, he spent two minutes picking up some of the harmful plastics and marine rubbish that had washed ashore.
Then he had a simple idea. What if everyone did the same?
So Martin used social media to spread the idea. And before long #2minutebeachclean started appearing on Twitter and Instagram around the World.
Martin took BBC News along to a beach near Bude in Cornwall to see how much litter could be picked up in two minutes.
Video Journalist: Dan Curtis