Oceans are losing oxygen due to climate change, which will affect hundreds of millions of people, according to a new United Nations report.
Scientists are calling this the “ultimate wake-up call” to humanity.
The ocean represents 97 percent of the physical habitable space on the planet and is central to sustaining all life on Earth.
The major drivers of ocean oxygen loss are climate change and nutrient pollution, with the latter affecting coastal areas.
Scientists say rising sea temperature caused by carbon dioxide and other greenhouse gas emissions is leading to oxygen-depleted zones to form on the sea bed.
The report found that the loss of oxygen from the world’s ocean is increasingly threatening fish species such as tuna, marlin and sharks.
Minna Epps, the director of the Global Marine and Polar Programme at the International Union for Conservation of Nature, talks to Al Jazeera about the crisis.
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