Source: Phys.org, 10/1/25
In a study published in the journal Ambio, researchers examined 52 peer-reviewed scientific papers on plastic found in the Amazon since 2000, particularly in fauna, fish, sediment and water. More than 90% of the research was concentrated in Brazil along the main Amazon River channel, and the most frequently reported microplastic fragment size was less than five millimeters. The findings make for troubling reading. Plastic contamination is not limited to a few spots; it's widespread across the basin. The review found plastic fragments and litter in the water, river sediments, and among plants and wildlife, including birds, fish and mammals. The most alarming discovery was the threat to human health. Researchers found that two-thirds (66%) of the studied animals (mostly fish) that contain plastic are regular food sources for local communities. This high level of contamination puts many people at risk of ingesting plastic fragments, especially microfragments.