ahlam1399
02-23-2016, 09:44 PM
New federal numbers show that amid falling gas prices, Americans drove a record 3.15 trillion vehicle miles last year. But this also means more pollution and traffic gridlocks.
أكثر... (http://www.npr.org/2016/02/23/467768203/cheap-gas-contributes-to-record-u-s-traffic-volumes?utm_medium=RSS&utm_campaign=news)
أكثر... (http://www.npr.org/2016/02/23/467768203/cheap-gas-contributes-to-record-u-s-traffic-volumes?utm_medium=RSS&utm_campaign=news)