oceans are facing unprecedented threats as a result of human activity. Every year, an estimated 8 million tons of plastic waste end up in the world's oceans. At the same time, climate change is damaging coral reefs and other key ecosystems; overfishing is threatening the stability of fish stocks; nutrient pollution is contributing to the creation of dead zones; and nearly 80 per cent of the world's wastewater is discharged without treatment.
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