Washington, April 18 : A new study has suggested that increasing carbon dioxide (CO2) and decreasing oxygen in the oceans will make it harder for deep-sea animals to "breathe".
The study, by marine chemists at Monterey Bay Aquarium Research Institute (MBARI), US, suggests that low-oxygen "dead zones" in the ocean could expand significantly over the next century.
These predictions are based on the fact that, as more and more carbon dioxide dissolves from the atmosphere into the ocean, marine animals will need more oxygen to survive.