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High Level of Mercury Found in Pumas Linked to Coastal Fog
High-levels of monomethylmercury (MMHg) has been detected in pumas (Puma concolor) roaming coastal central California, USA. Coastal fog has been implicated as the likely culprit.

Pumas and their associated food web in coastal central California live in a region that is regularly inundated with marine fog. The researchers found that adult puma fur and whisker samples from fog-influenced study region had three times more mean total mercury (THg) levels than that in comparable samples collected from pumas living further inland.

According to researchers, mercury in the sea comes from coal-fired power stations and gold mining activities. Forest fires and volcanic eruptions also contribute but only one in five mercury atoms are from these natural sources. Human pollution is the biggest contributor.

 
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Florida Struggles to Overcome Threats to Freshwater Springs - Silver Springs, just outside of Ocala, was once a beautiful clear artesian spring. Tourists flocked to the area, it was a backdrop for Hollywood movies, it made underwater photography famous. Now, a sharp drop-off in flows and a steady rise in algae are causing state officials to take notice of the dramatic increase in groundwater being pumped from the aquifer.


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