Plastic pollution is now undeniable and its effects are visible everywhere. But it has not always been like this.

In 1971, marine biologist Edward Carpenter made a shocking discovery, finding small bits of plastics floating thousands of miles off the east coast of America, in the Atlantic Ocean.

More than 50 years later he tells the story of how he had to fight hard to get the scientific world to take notice of his discovery.

Watch the video to find out more!