A new report estimates that cleaning up phosphorus pollution in the St. Johns River, caused by sludge spread on upstream farmland, could cost communities over $1.1 billion. The pollution, stemming ...
The oil inside your car's engine can sludge up with neglect and infrequent oil changes. Sludge is a nasty contaminant that can destroy an engine if not given attention, but timely oil changes are a ...
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