A new study combined genetic data from iPSYCH with air pollution data from the Department of Environmental Science to show that the higher the level of air pollution the higher the risk of schizophrenia. For each 10 mg/m3 (concentration of air pollution per cubic metre) increase in the daily average the risk of schizophrenia increases by approximately twenty percent. Children who are exposed to an average daily level above 25 mg/m3 have an approx. sixty percent greater risk of developing schizophrenia compared to those who are exposed to less than 10 mg/m3 explained Senior Researcher Henriette Thisted Horsdal who is