Two children’s stories on water quality from the Amazon and the Mississippi River

The Amazon River is a major source of water pollution in many parts of the world.

But a new study suggests that even when the river is clean, the rivers water quality is also questionable.

A new study by researchers from the University of Tennessee found that the Amazon is far from being a clean water source.

Researchers at the university’s School of Natural Resources and Environmental Science have developed a computer model that uses a suite of sophisticated statistical techniques to predict the effects of different factors on the water quality of the river.

The study, published in the journal Environmental Research Letters, finds that while the Amazon has a long history of having a good water quality record, there are significant uncertainties about its water quality.

The researchers predict that the river’s water quality will vary from year to year, even with natural variability.

While water quality varies from year-to-year, there’s a very large variability in water quality at the surface.

The authors note that, in many cases, water quality measurements are done with a precision of only 0.0001 percent.

In some places, the water is so polluted that it can no longer be safely used as drinking water.

This is where a new generation of water purification technologies could be useful.

In this case, the study notes, purification technology can be used to purify the water so that it is clean enough to drink.

The Amazon has been a major environmental problem in recent years, with serious impacts from illegal mining and pollution from the mining of the Amazon.

In some regions, the river has been declared a World Heritage site.

The Amazon is also a major economic force in the world and is the main source of freshwater for the entire world.

The scientists have calculated the effects on water resources and the quality of rivers water and found that a variety of factors can impact the water’s quality.

These include climate, the amount of pollutants entering the river, the presence of human activity, the level of pollution, the type of sediment used, the species of fish that inhabit the river and the amount and type of organic matter in the water.

The research also shows that river sediment is often a key indicator of water quality, which can help to determine how long the river will remain pristine.

According to the study, water pollution from deforestation is the most significant factor in the quality decline of the water in the Amazon basin.

The authors found that pollution is primarily concentrated in the river basin, but that in some areas of the basin the pollution is also affecting the river water itself.

They note that water quality in these areas may be less affected by human activity and that the rivers watershed may be more contaminated.

The researchers warn that water pollution can cause major ecological and health problems.

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