Prominent Northeastern grocery store chain Hannaford Supermarkets made headlines recently by declaring that for an entire year it had not sent any spoiled or outdated food to landfills, where the organic decomposition process produces methane, one of the most potent greenhouse gases. Instead, Hannaford, which operates in New England and New York, is contracting with an anaerobic food reprocesser to strip the food from its packaging, mix it with microbes and manure, and turn it into fuel, fertilizer and bedding for dairy cows.