Carbon emissions have put marine species at risk of ecological catastrophe. The oceans are acidifying at a faster rate, due to carbon emissions, threatening the survival of the species.
When seawater becomes too acid, corals and shrimp-like plankton at the bottom of the food chain cannot survive.
The knock-on effects can lead to widespread mass extinction of marine species - and is believed to have done in the past.
New research has shown that even during periods of past mass extinctions the ocean acidity rate nowhere near matched what it is is today.