Auckland’s urban areas are the main focus of the Unitary Plan’s objectives and policies relating to the management of contaminated discharges to air. This reflects the concentration of people and contaminant generating activities in proximity to each other. In our coastal marine area (CMA), air discharges are highly localised and usually temporary in nature. In our rural areas low densities of development do much to provide adequate buffers to manage the effects of contaminants on human health and neighbourhood amenity values, provided good on site management practices are carried out.In urban Auckland higher population densities, mixed residential, commercial and industrial land uses and the operation of high numbers of vehicles means there needs to be a greater focus on both the management of individual discharges from various sources and the separation of incompatible land uses and activities. The quality of air discharges from domestic fires is targeted for improvement by the use of new and efficient solid fuel burning appliances, There are also industrial processes that cannot avoid discharging contaminants into the air and their operation needs to be recognised and supported.