Some energy experts and environmentalists have expressed skepticism about the benefits of biofuels, especially ethanol produced from corn.

VOA: standard.2009.09.02

Corn-based ethanol produces only slightly more energy than it takes to produce it.

VOA: standard.2009.09.02

The bioreactors will grow algae that can produce ethanol fuel through a special process that involves using carbon dioxide from nearby coal-burning power plants to promote faster growth of the algae.

VOA: standard.2009.09.02