TABLE 7.1 Annual Requirements for Principal Primary Materials Used in the United States (Pounds per capita, 1972)

A. Nonmetallic Inorganic Materials:

 

 

Sand and gravel

9000

 

Stone

8500

 

Cement

800

 

Clays

600

 

Salt

450

 

Other

1200

20550

B. Metals:

 

 

Iron and steel

1200

 

Aluminum

50

 

Copper

25

 

Lead

15

 

Zinc

15

 

Other

35

1340

C. Natural Organic Materials:

 

 

Forest products

2750

 

Natural fibers and oils

50

 

Natural rubber

10

2810

D. Synthetic Organic Materials:

 

 

Synthetic polymers

116

 

(including rubber)

 

116

 

TOTAL

24816

(Equivalent total for entire U.S. population = 2.57 billion short tons.)



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