Environmentally friendly food practices are all the rage these days — from organic farming at the White House to cooking manure to harness energy from methane gases — but is there a need to codify it into government policy?Across the country, local government officials are proposing “green food resolutions” — partially at the behest of a campaign run by Farm Sanctuary, a farm animal protection organization. This week, Chicago became the first city to pass a green food resolution. Although the