In 2022, the proposal would require 36 billion gallons annually of renewable fuels, of which 16 billion gallons must be cellulosic biofuels; and 1 billion gallons must be of biomass-based diesel. At most 15 billion gallons of the renewable fuel mandate can be met with conventional biofuels, including corn-based ethanol.
For the first time, some renewable fuels must achieve greenhouse gas emission reductions compared to the gasoline and diesel fuels they displace. Refiners must meet the requirements to receive credit toward meeting the new standards.