Green teams are dedicated groups of employees, regardless of discipline or organizational level, which facilitate the pragmatic implementation of sustainable operations principles on their unit. Green teams range from the informal - a few employees working together to increase recycling opportunities for themselves and their community, to the formal - a group specifically chartered by leadership to promote and foster sustainable operations that reduce a unit's environmental footprint. Green teams are often "place-based", meaning that the issues they choose to work on are meaningful to their specific community and geographic location. What is sustainable in one location may be very different than in another location because the natural resources, culture and economic situations are all different. However, some green teams operate across geographic units to foster awareness and technology transfer within a particular sustainability area of concern, such as energy management.