compute environment_impact_level for prepared meals, bug #1651
compute environment_impact_level for prepared meals, bug #1651

openfoodfacts/openfoodfacts-server,openfoodfacts/openfoodfacts-server,openfoodfacts/openfoodfacts-server,openfoodfacts/openfoodfacts-server,openfoodfacts/openfoodfacts-server