Most people are familiar with the importance of oil for the internal combustion engines that power our modern vehicles. The petroleum-based fluid is designed to provide lubrication to the vast amount ...

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 ...

Maine was the first state in the nation to ban the use of sludge as a fertilizer. Now, the Maine Organic Farmers And Gardeners Association plans to take the EPA to court over farmland lost to forever ...