Is Ethanol sustainable?

"There is just no energy benefit to using plant biomass for liquid fuel," says David Pimentel, professor of ecology and agriculture at Cornell. "These strategies are not sustainable."

David Pimentel has claimed the answer is no for years, and recently confirmed his findings again. But is he any more right today than he was was 10 years ago?

Apparently not:

Pimentel in bed with petroleum industry, research discredited!

Life Cycle Energy Efficiency

THE 2001 NET ENERGY BALANCE OF CORN ETHANOL

Technology Breakthrough Enables Biodiesel Production from Ethanol Plants

Ethanol and sustainable development

Is ethanol energy-efficient?

Critical study of biodiesel is flawed

David Blume Presentation: Alternative Fuels – Promise and Perils