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Vancouver is a member municipality of Metro Vancouver, a regional government. In total there are 22 municipalities, one electoral area and one treaty First Nation comprising Metro Vancouver, the regional government whose seat is in Burnaby. While each member of Metro Vancouver has its own separate local governing body, Metro Vancouver oversees common services and planning functions within the area such as providing drinking water; operating sewage and solid waste handling; maintaining regional parks; overseeing air quality, greenhouse gases and ecological health; and providing a strategy for regional growth and land use.