1.
, . : - , , - , .
(needs, wants) - - , .
, . (, , ) , , .
, .
(resources) .
(, , , ) ( ). , :
(renewable) , . , , , , , . 70% ; 3% ; 80% .
(non renewable) , , , . 60% , 200 . , 40 , 60, 200, 240, 14 . .
, , . , , . , : . -, , .
(scarcity) .
, : . , , , , : . , , : .
, , , .
(economics) , .
.
.