A natural gas fueling station powered by cow manure from one of the nation’s largest dairy cooperatives has opened in northwestern Indiana.  Investors in the AMP Americas’ station that opened Monday along Interstate 65 near the town of Fair Oaks say the station completes a transportation corridor, along with a sister station along I-65 in southern Indiana. The stations will fuel 42 milk delivery trucks owned by Fair Oaks Farms, a dairy cooperative of 10 farms housing about 35,000 cows. Those trucks deliver milk to three Kroger grocery store dairies serving 560 retail stores in eight states.