With the promotion of alternative fuels, concerns arise regarding their impact on the environment. To address these concerns Title II makes a number of specific changes to existing policies. Changes include the extension of EPAs authority under the Clean Air Act (CAA) to control engines, vehicles, fuels, and fuel additives to include effects on water pollution. Additionally, the EPA administrator is to study adverse effects on air quality resulting from the expansion of the RFS and to promulgate regulations to mitigate said effects.
