ecological threats to the ocean

overfishing - Science estimates that there will be no commercially harvestable seafood left by 2048.

bottom trawling - scrapes the bottom destroying coral gardens etc.

Longliniing - incidentally catches animals and birds, including turtles and albatrosses

pollution - sewage and industrial - treated as a rubbish pit

desal plants are a new threat.

Channel deepening and dredging off coasts

CO2 emissions which concentrate carbon in the water which screws up the pH - and causes ocean acidification

garbage - especially plastics which sea creatures eat and which then kills them.

200 dead spots in the ocean.