What are two benefits of the new miles-per-gallon requirements? Are these benefits in someone’s self-interest or in the social interest?

Obama will drive up miles-per-gallon requirements Obama’s revision of auto-emission and fuel-economy standards will require automakers to boost fuel economy to 35.5 miles per gallon by 2016, notching up 5% each year from 2012, to limit the amount of carbon dioxide cars can emit.