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.
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
Carbon sink - A forest, ocean or other natural environment able to absorb large amounts of carbon dioxide from the atmosphere. The Amazon rainforest, for example, absorbs two billion tons of carbon dioxide each year.