Thu, 16 Aug 2012 19:56:00 CDT
Carbon dioxide emissions hit an unexpected 20-year low earlier this year, mainly because utilities have switched from coal to natural gas.
Read full article at: usatoday.com
Thu, 16 Aug 2012 19:56:00 CDT
Carbon dioxide emissions hit an unexpected 20-year low earlier this year, mainly because utilities have switched from coal to natural gas.
Read full article at: usatoday.com