An air pollution management system comprising a control system 22 and a ventilation system 12 for an enclosed space 14. The ventilation system has an air intake 13, an air extract 15 and ventilation devices for controlling flow of air through the enclosed space. The control system, using a plurality of sensors 40A-40C, determines pollution data for the external environment; determines current pollution data for the enclosed space; predicts pollution data for the enclosed space based on the external environment data and on the current pollution data; generates control data based on the predicted pollution data; and causes the ventilation system to control the ventilation devices using the control data. The external environment pollution data may be determined by measurements taken at the air intake by sensor 40A.The pollution data for the enclosed space may be determined by sensor 40B, a temperature sensor 37 and carbon dioxide sensor 38 may also be provided.
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