A “Even thoughit may be 5 to 10 years before green gasoline arrives at the pump or finds its way into a jet airplane,” (lines 12-14) –comparison
B “…whilefitting into the existing infrastructure today.” (lines 22-23) –consequence
C “…thenrapidly cooled the products to create a liquid that contains many of the compounds found in gasoline.” (lines 27-29) –contrast
D “‘Green gasoline is an attractive alternative to bioethanolsinceit can be used in existing engines…’” (lines 32- 33) –reason
E “‘Making it from cellulose sourcessuch asswitchgrass or poplar trees grown as energy crops,” (lines 40-42) –addition