Māris kļaviņŠ, azamat azizov, JĀnis zaļoksnis environment, pollution, development: the case of uzbekistan

 7.2. 
 Nitrogen compounds in the atmosphere
Nitrogen constitutes 76% of the weight of the atmo sphere, 
however, in hydrosphere and litho sphere the amount of nitrogen 
compounds is significantly lower. Nitrogen compounds in the atmo-
sphere are found in the form of many compounds: N
2
O, NO, N
2
O
3
, 
N
2
O
4
, N
2
O
5
, NH
3
, ammonium salts. Other nitrogen oxides are either 
formed as intermediate products in various reactions or are unstable 
and decompose rapidly:
Nitrogen (I) oxide (N
2
O) is naturally present in the atmo sphere 
as a product resulting from a variety of biologic transformations. 
The amount of anthropogenic emissions of N
2
O is relatively small 
(Table 7.3) and, subsequently, the pollution of nitrogen (I) oxide,