By 2020, pollution, including excess nutrients from industry (mining, agriculture etc) has been brought to levels that

By 2020, pollution, including excess nutrients from industry (mining, agriculture etc) has been brought to levels that are not detrimental to ecosystem functions and biodiversity

https://chm.cbd.int/database/record?documentID=242701

Pollution, especially excess nutrients from mining and agriculture is detrimental to actuation Biodiversity

Aichi targets

8. Pollution reduced