One report says that 10 percent of respiratory infections in European children are a result of fine particulate pollution, with an even higher rate in traffic - congested cities.
पुष्कळ वाहने आणि खासकरून डिझेलवर धावणारी वाहने, मोठ्या प्रमाणावर सूक्ष्म कण बाहेर सोडतात.