The United Parcel Service plans to convert its more than 2,000 gasoline-powered trucks in the Los Angeles area to run on cleaner-burning natural gas.
A to convert its more than 2,000 gasoline-powered trucks in the Los Angeles area to
B to convert its more than 2,000 trucks in the Los Angeles area that are powered by gasoline to
C on converting its more than 2,000 gasoline-powered trucks in the Los Angeles area that will
D for its more than 2,000 gasoline-powered trucks in the Los Angeles to convert to
E that its more than 2,000 trucks in the Los Angeles area that are powered by gasoline will convert to
