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Aquaculture Chemicals are Polluting Chilean Rivers
After previous studies showed dirty, sediment filled waters were harming Chilean rivers, regulators forced aquaculture operations to do a better job of filtering and cleaning their waste water.

Most fish farms draw water from clean Chilean rivers and return the waste water downstream. New rules have ensured that wastewater is now much less turbid, but new research shows many chemicals -- the remnants of fish and food waste, as well as antibiotics and disinfectants -- still bypass the installed filters.

Analysis, detailed in the journal Scientific Reports, showed aquaculture wastewater significantly increases the concentrations of carbohydrates and proteins -- as well as their more basic chemical building blocks -- into the river.



 
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Thousands of Fish Dead in Nevada Marina Mystery - Scientists say a bitter cold snap could have caused oxygen-poor waters to rise from the old rock quarry's bottom to the surface, but they don't understand what sparked the massive die-off and they have been unable to detect any live fish in the 77-acre lake.


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