pollution

NASA has identified several hundred marine dead zones around the world. A dead zone is an area in the ocean where the oxygen level is...
Reportage: Daniel Hager
Research: Loke Nyberg
The calm turquoise waters along Thailand's coast can look idyllic. But beneath the surface lurks a treacherous disease that is spreading and killing vital coral...
Text: Helena Nordenberg/TT
Graphics: Anna-Lena Lindqvist/TT
Photo: Lillian Suwanrumpha/AFP/TT
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