Oceanic absorption of CO2 is good for the air but turns the water acidic branding it climate change's "evil twin". "The sexiest way to put it is that 'ocean acidification' is the 'evil twin' of climate change. While much research has gone on in regards to carbon dioxide's (a major element of greenhouse gases) impact on the atmosphere, much less has been done looking at how it affects the oceans. What scientists do know is that the oceans absorb half of the world's carbon dioxide, which is great for the air, but ultimately turns the waters acidic. How corrosive the oceans have become is the question; along with how badly marine life is affected."