Used oil can negatively impact the environment if it is improperly disposed of. Unfortunately, some used oil gets emptied into sewers, some used oil is dumped directly on the ground to kill weeds, and some used oil gets accidently spilled. The result when handled improperly is that it can easily go into the groundwater. If one gallon of used oil gets into the water supply, it can contaminate one million gallons of water. That is a year’s supply for 50 people. In the United States, used oil is the largest, single source of water pollution.
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