ExxonMobil presses on after other oil giants drop green algae as biofuel

Some scientists regard ExxonMobil Corp.’s long-running quest to turn algae into a transportation fuel as little more than a PR stunt. ExxonMobil says they are wrong. Using genetic engineering, the oil giant says it is closer to its goal of fueling jets and heavy trucks with oil distilled from the tiny organisms. With government subsidies