They also have complex functions like 
reproduction. . Life is considered to be the 
manifestation of man-made activities along 
with these natures. All areas where life exists,
 including soil, surface rocks, water, air,
 and atmosphere in the Earth's outer shell,
 are 
parts of the biosphere. These biological
 processes tend to modify or alter the 
biosphere.
A broad field of geophysics considers the 
biosphere as a global ecological system. 
This ecology integrates elements including 
the earth, water, atmosphere, and living 
human beings and their relationships. 
About 75 billion tons of organisms (6.8×1013)
 are known
 to live on Earth and inhabit various environments of the biosphere.[44]

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