Environmental modeling by the University of Illinois at Chicago, Energy Resources Center has shown the following: 

• Will reduce GHG emissions by the year 2050 by 3.7 billion metric tonnes which will save $158 billion in monetized damages
• By encouraging increased ethanol use will reduce aromatics-related mortalities by 1,400 cases by the year 2050 which will save $12.7 billion in economic and monetized health damages 
• The combined savings (reduced aromatics + reduced GHG emissions) from the Next Generation Fuels Act total $170 billion through the year 2050

Source: Health and Environmental Benefits of the Next Generation Fuels by Steffen Mueller, PhD; Principal Economist; University of Illinois Chicago, Energy Resource Center