Negative externalities (Negative Externalities) refers to cost more (External cost or Spillover cost) born to third parties. (Third Parties) from economic activity.The price of the market do not have to join the costs incurred to the other persons with this. The economic system of goods and services produced much more than it should be (Overproduced), such as the neighbours buy new trees planted.But as we buy adjacent to people who are allergic to pollen. We received this negative externalities from action of a neighbor. Or, for example, in the environment, such as factory located upstream release chemicals without ได้บำ treatment.Water is a chemical contamination and can't be used for production. This effect does not consider factory is located upstream the quantity of chemicals should be because of cost is ignored.
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