******************
( )
************************************************** *********
( weathering and soil )
***************
********
************
.
solar system
******************
ATMOSPHERE
( )
**********************
( - )
( - - )
Hydrosphere
( )
Biosphere
( )
*************************
( )
( ) ( )
( + )
( )
************************************************** ******
the end
************************************************** *********
********* **********
the city
. ( - - ) ( )
( )
( )
( )
/
( )
( )
---------------------------------
*
*
( )
* ( - )
* ( )
* ( )
* ( twin cities )*
*
*
*
************************************************** *******
the end
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