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Automobiles can be manufactured in such a way that they are not significant point source polluters yet are high-quality products, as Japan demonstrated in the 1980's when they adopted American environmental standards. there just needs to be co-operation between automakers and environmental regulators like the EPA.
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Point source pollution is the pollution that single identifiable e.g air pollution from industrial area.Non point source is the contamination that comes from else where carried to a particular location.
Is light pollution a point source or non point source?
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What is non-point source pollution?
Environmental regulations are designed to control the amounts and effects of pollutants released by agricultural, industrial, and domestic activities. These laws recognize two categories of pollution and polluters:
point source pollution and
non-point source pollution.
Point sources are single, discrete locations or facilities that emit pollution like a factory, smokestack, pipe, tunnel, ditch, container, automobile engine, or well.
Because point sources can be precisely located, the discharge of pollutants from them is relatively easy to monitor and control. For example, the United States Environmental Protection Agency, or EPA, sets emission standards for particular chemicals and compounds. Then, outflow from the point source is sampled, and the pollutants in it are measured precisely to ensure that discharge levels are in compliance with regulations.
New techniques to reduce emissions from point sources are more likely to be developed because their effectiveness can be evaluated quickly and directly and because point source polluters have an obvious financial incentive to reduce waste and avoid regulatory fines.
Non-point sources are diffuse and widespread. Contaminants are swept into waterways by rainfall and snowmelt or blown into the air by the wind. They come from multiple sources, such as vehicles dripping oil onto roads and parking lots, pesticides used on lawns and parks and fields, wastes deposited by livestock
and pets, or soil disturbed by construction or plowing.
Non-point source pollution is more difficult to regulate than point source emissions. Contamination is measured not at the source, but at the destination. Samples are collected from the air, soil, and water, or from the blood and tissues of organisms in polluted areas. The contribution of various non-point sources
to these pollution levels can only be estimated. EPA regulations cannot be directed at specific individuals or businesses and are instead generally directed at municipalities.
It can be difficult to reduce many types of non-point source pollution because most of the people who contribute to it are not directly faced with legal or financial consequences. Individuals must be persuaded that their activities are causing ecological harm and that they should alter their behavior or spend their money to remedy the situation.
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