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

 7.1. 
 Sulfur compounds in the atmosphere
The most significant source of sulfur and nitrogen compounds 
in the atmo sphere today is economic activity. In 2006, 65% of the 
total sulfur compounds in the atmo sphere were released as a result 
of human activities, furthermore, 90% of that amount accounted for 
sulfur dioxide.
Sulphur is a widespread element on the Earth: its average 
concentration is 1.8 to 2.9%, but in the atmo sphere just 0.6 µg/m
3
. 
Most of the sulfur compounds are found in the litho sphere and 
hydrosphere. The occurrence of sulfur compounds in the environ-
ment has increased significantly with intensified human economic 
activities and, first of all, it must be associated with the start of the