Amazon 
Environment 
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National At least 20% of the Amazon microbasins are heavily impacted by activities or infrastructure that take place around them, such as hydroelectric plants — the main pressure agent —, mining and illegal mining, roads and agriculture.
This is the conclusion of a new index, the IIAA (Impact Index on the Waters of the Amazon), created by Ambiental Media, with the support of the Serrapilheira Institute and the participation of researchers.
The index is part of the Aquazônia project, launched on 05/05. The IIAA ranges from 0, which means very low impact, to more than 5, for extreme impact rating.
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