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

 8.3. 
 Most significant water pollution problems
As  a  result  of  human  activities  the  water  is  pervaded  by 
substances  different  from  those  formed  in  natural  processes,  and 
they  significantly  affect  water  composition  and  properties.  These 
are inorganic substances (biogenic elements, inorganic salts, toxic 
microelements, and radionuclides), organic substances (biologically 
readily degradable substances, petroleum products, pesticides, 
surfactants etc.) as well as physical impacts (Table 8.4). 

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8. WATER POLLUTION