Pollution: Dead Zones
Agricultural run-off, which involves the discharge of nutrients, pesticides, untreated sewage, and plastics, accounts for approximately 80 percent of all marine pollution around the world. Excessive nutrients from untreated sewage and agricultural run-off have contributed to dead zones in which most marine life cannot survive and have already collapsed several ecosystems. There are close to 500 dead zones so far. In all, they cover over 245,000 km² of land worldwide. If all these dead zones were in one area, their size would be roughly equivalent to that of the United Kingdom.
Pollution: Dead ZonesAgricultural run-off, which involves the discharge of nutrients, pesticides, untreated sewage, and plastics, accounts for approximately 80 percent of all marine pollution around the world. Excessive nutrients from untreated sewage and agricultural run-off have contributed to dead zones in which most marine life cannot survive and have already collapsed several ecosystems. There are close to 500 dead zones so far. In all, they cover over 245,000 km² of land worldwide. If all these dead zones were in one area, their size would be roughly equivalent to that of the United Kingdom.
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