Imagine a world with dead oceans; no coral reefs, no fish, no whales, no dolphins, basically no underwater ecosystem. The ocean contributes 50 per cent of the oxygen we breathe in and absorbs carbon dioxide from the atmosphere.
It also provides a sixth of the animal protein we eat. Dead oceans would drastically destabilise families that depend on this ecosystem for their livelihoods, reduce the oxygen supply, create a shortage of food and reduce foreign exchange that would be earned from marine tourism.