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Any substance (impact) introduced by a man having a negative influence on the environment

withdrawal and economic usage of substances contained in industrial, municipal and domestic discharges and wastes that pollute the environment. The pollutants, thus, can represent an independent value (oil, fats, metals) or to be used as raw material for production of useful goods.

pollutants, simultaneous presence of which in wastewater or off gases needs to be registered with summing up of their effect.

Any substance in air that could, in high enough concentration, harm man, animals, vegetation or material. Pollutants may include almost any natural or artificial composition of airborne matter capable of being airborne. They may be in the form of solid particles, liquid droplets, gases, or in combination thereof. Generally, they fall into two main groups: (1) those emitted directly from identifiable sources (see air emissions) and (2) those produced in the air by interaction between two or more primary pollutants, or by reaction with normal atmospheric constituents, with or without photo activation.

A pollutant that has a lesser harmful impact on the environmental situation but still needs to be given a certain attention in course of monitoring over the observance of the appropriate requirements.

source of the environmental impact pertaining to dilution of pollutants in surface and/or underground waters, and also in sewage collectors including those at the disposal of wastes.