Decline in ocean oxygen levels will have severe impact on marine life

The effects of greenhouse gases could be even worse than we thought. 

Scientists and oceanographers from Germany have found a decline of more than 2 percent in ocean oxygen content worldwide between 1960 and 2010. Because oxygen in the global ocean is not evenly distributed, the 2 percent overall decline means there is a much larger decline in some areas of the ocean than others - severely impacting marine life species as we know them. 

Declining oxygen levels can worsen global warming. Sea levels could rise twice as much as previously predicted. 

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