CBSE Class 9 Answered

It is not always possible to limit the polluting activities to a particular area. For eg. automobiles are one of the largest sources of air pollution. But we cannot restrict its use in one particular part of a city. Also restricting the polluting activities to certain areas will not reduce pollution since that much more pollutants will be released in that area. The entire environment is interlinked and its harmful effects will slowly creep into other places.

A more feasible and practical approach would be to reduce the pollution wherever it be. For eg.  Automobiles can use clean non-polluting fuel such as CNG. Similarly treatment of effluents should be carried out before releasing them into water bodies to prevent water pollution. Also use of chemicals in agriculture could be replaced by biological and ecofriendly methods such as manures and bioinsecticides. Such methods would be more useful in controlling pollution.