The U.S. fuel economy standards, one of the longest-running energy regulations in the United States, have led to big savings for consumers and helped cut greenhouse gas emissions and America’s reliance on foreign oil producers over the past four decades, Princeton University researchers found in a recent assessment of the standards. According to the paper of Princeton University researchers, the Corporate Average Fuel Economy (CAFE) Standards, enacted in 1975, have saved US$5 trillion in fuel costs and prevented 14 billion metric tons of… via https://ift.tt/2ZarCYO