Can we save our oceans? Prince William wants to help the world’s biggest and most important ecosystems before it is too late.
Prince’s plea to stop plastic pollution
Drowning: Every day, roughly 2,000 bin lorries' worth of plastic enters the world's rivers, oceans and lakes. Glossary
Species - A set of animals or plants with similar features. Members of the same species can breed with each other.
Prince William - The son of King Charles III, and the next in line to the British throne.
Threat - A possible source of danger.
Japan - An island country in East Asia, with a population of nearly 126 million.