dioxide in the atmosphere since the industrial revolution the world's oceans have absorbed half of the carbon dioxide. the gas dissolves in the oceans reducing their ph values. our oceans are becoming more acidic. all organisms with the calcium based skeleton are in danger because the acidic water dissolves limestone. jellyfish don't have a skeleton therefore the acidification of the oceans isn't a problem for them they survive. jennifer herself describes further negative effects. the high amount of fertilizer used in agriculture leads to nutrients getting into the oceans via groundwater rivers. this causes phytoplankton blooms. tiny algae which form huge carpets as can be
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