Paragraph 4 (lines 24-31) informs that UMass researchers...

A creating a hot liquid from standard gasoline adding catalysts. B using cellulose with liquids that catalyze gasoline in less than two minutes. C applying moderate heat to compounds found in gasoline to produce a solid catalyst. D slowly cooling the product of solid catalystic reactions which will produce cellulose. E heating cellulose with specific catalysts and then cooling the product so it transforms into a liquid.