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Animal or vegetable residues that contain significant amounts of nitrogen. Source: World Bank

Gases consisting of one molecule of nitrogen and varying numbers of oxygen molecules. Nitrogen oxides are produced in the emissions of vehicle exhausts and from power stations. In the atmosphere, nitrogen oxides can contribute to formation of photochemica

Product of combustion from transportation and stationary sources and a major contributor to acid deposition and the formation of ground level ozone in the troposphere. Source: World Bank

The result of nitric oxide combining with oxygen in the atmosphere. A major component of photochemical smog. Source: World Bank

The process whereby ammonia in wastewater is oxidized to nitrite and then to nitrate by bacterial or chemical reactions. Source: World Bank

A gas formed by combustion under high temperature and high pressure in an internal combustion engine. It changes into nitrogen dioxide in the ambient air and contributes to photochemical smog. Source: World Bank

A compound containing nitrogen which can exist in the atmosphere or as a dissolved gas in water and which can exist in the atmosphere or as a dissolved gas in water and which can have harmful effects on humans and animals. Nitrates in water can cause seve

Decreasing the acidity or alkalinity of a substance by adding to it alkaline or acidic materials, respectively. Source: World Bank

Means the visible high watermark of any lake, river, stream or other body of water where the presence and action of the water are so common and usual and so long continued in all ordinary years as to mark upon the soil of the bed of the lake, river, strea

The relationship between the amount of pollution produced and the amount of raw material processed. For example, an emission factor for a blast furnace making iron would be the number of pounds of particulates per ton of raw material