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Annually, about 30 billion tons of CO2 gas are released into the atmosphere mainly through the combustion of the fossil fuels coal, oil and gas. Some of this CO2 gas dissolves in the ocean and forms carbonic acid. Whilst the oceans are vast and deep, there is so much CO2 being absorbed by them that they are slowly becoming more acidic. This presents a number of major problems for the oceans and consequently for humans. Specifically, increasing ocean acidity is though to affect living organisms, particularly those that form calcium carbonate exoskeletons. Much of the tiny marine life at the first link of the food chain fall into this category and it is feared that if these are unable to reproduce, the repercussions will be felt all the way up the chain. Furthermore, acidified oceans increase coastal erosion. New evidence also shows that ocean acidification could dramatically interfere with the production of a vital gas called di-methyl sulfide (DMS). DMS is released by plankton and is believed to be a major element in the formation of clouds. Less DMS means less clouds which probably means more heat reaching the oceans. On a broad-scale, the solution to ocean acidification is to stop putting CO2 in the atmosphere and to remove as much of the excess that is already there.