11.   This will normally require the use of the best environmental practice within the industry.

12.   And gasoline prices are typically higher in California because of strict federal pollution regulations that require use of cleaner-burning fuels.

13.   And while commercial sites usually require the use of a credit card, some pornography sites offer free photographs to lure customers.

14.   And while the laser can eliminate the need for Novocain in most cases, deep cavities may still require the use of some anesthesia.

15.   Another improvement would be requiring the use of commissaries, others suggested.

16.   Both the shuttle and the Atlas require the use of the same Air Force radar tracking equipment.

17.   All applications by Internet, fax and phone require the use of a Visa, Mastercard or American Express card.

18.   Both operations require exclusive use of the same Air Force radar tracking network.

19.   But he has always stopped short of requiring their use.

20.   But the growing movement to recycle paper could reverse the acid-free successes, since recycling some kinds of paper requires the use of acid.