Welcome to Hawaii's 'plastic beach': ground zero of a pollution crisis

Kamilo Beach, located on Hawaii's Big Island, has been called one of the most plastic-polluted spots on Earth

An array of plastic crunched underfoot as Mattie Mae Larson walked down Kamilo Beach. Toothbrushes, a plastic broom, a leaking bottle, the back of a TV.

Larson used to come to this remote stretch of Hawaiian sand as a child to climb 10ft high mountains of debris, searching for treasures.