Greenhouse Gases Hit Record High Amid Fears of CO2 Saturation Point. Data suggest natural "carbon sinks" may be nearing exhaustion, say some scientists, although others disagree.

With the Southern Ocean reaching its saturation point, more CO2 will stay in our atmosphere,” said lead author of the study, Dr Corinne Le Quéré of UEA and BAS.

What is the 'other carbon dioxide problem'? How are humans driving changes in the chemistry of the ocean, and what might this mean for marine ecosystems in the future?