FILE - In this Dec. 10, 2008 file photo, a worker monitors the production line as cases of Fage yogurt are produced in Johnstown, N.Y. Whey, a byproduct of Greek yogurt production, is

 

              FILE - In this Dec. 10, 2008 file photo, a worker monitors the production line as cases of Fage yogurt are produced in Johnstown, N.Y.  Whey, a byproduct of Greek yogurt production, is
FILE - In this Dec. 10, 2008 file photo, a worker monitors the production line as cases of Fage yogurt are produced in Johnstown, N.Y. Whey, a byproduct of Greek yogurt production, is collected at Gloversville-Johnstown wastewater plant west of Albany, N.Y., and mixed with anaerobic bacteria. The resulting methane gas becomes combustible fuel that generates nearly enough electricity to power the plant. (AP Photo/Mike Groll, File)