Can we save our oceans? Prince William has launched an impassioned plea to save the world’s biggest and most important ecosystems. Scientists fear it may be too little, 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
Monaco - A sovereign city-state in Europe, on the French Riviera.
David Attenborough - An English broadcaster and natural historian known for his wildlife documentaries.
Plankton - A general term for small organisms drifting in the sea or freshwater. Krill fall into the category, and are actually a kind of small shrimp.
calcium carbonate - a white solid occurring naturally as limestone or chalk rock