cited this week from Nature News:
"State rule says biofuels aren't so green.
The state of California has adopted regulations to curb greenhouse-gas emissions from transportation fuels, codifying evidence that biofuels are significantly dirtier than they were once thought to be.
The California Air Resources Board approved its 'low-carbon fuel standard' on 23 April, requiring fuel providers to cut the greenhouse-gas emissions from fuels by 10% by 2020, compared with 2010 levels. "
from Jeff Tollefson
Nature on California rule and biofuels...
