| web | https://www.theguardian.com/environment/2018/jan/04/oceans-suffocating-dead-zones-oxygen-starved |
| author | Damian Carrington |
| publication | The Guardian |
| date | 2018-01-04 |
| web | Denise Breitburg, Lisa A. Levi... | Science | 2018-01-05 |
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