Sulphur dioxide concentrations and exceedances 2005–13
New Zealand's Environmental Reporting Series: The Ministry for the Environment and Statistics New Zealand
Sulphur dioxide (SO2) is a gas produced from human (eg industry and shipping) and natural (geothermal and volcanic) activities. Nationally, the main human-made source of sulphur oxides emissions is industry. SO2 is associated with respiratory problems, such as bronchitis, and can aggravate the symptoms of asthma and chronic lung disease.