International environmental laws are needed in order to ensure that the whole world is protected from environmental degradation.
Many pollutants can migrate from the sources where they are released to other places, very distant from the point of release. Often times, pollutants do not recognize international boundaries.
Pollutant gases released in one country may still be detected in another country far away from the country where the gases were released.
As a result of this, it is important to have international laws that set limits concerning the maximum allowable concentration of certain pollutants that can be discharged into air, water or land.
By so doing, the whole world will be protected from the harmful effects of dangerous pollutants.
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