One of the major problems with all the excess carbon dioxide in the atmosphere is that the oceans, which serve as a carbon sink, are becoming increasingly acidic. In fact they have become 30% more acidic over the past 250 years after being relatively stable for the previous 20 million! So reports the NRDC (Natural Resource Defense Council) in an alarming article on the current and future state of our oceans and their delicate ecosystems. They caution that: A more acidic ocean could wipe out species, disrupt the food web and impact fishing, tourism and any other human endeavor that relies on the sea.
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