In winter, Christchurch can suffer from severe air pollution because of the formation of an inversion layer – a blanket of cold air trapped close to the ground by a warmer layer above it. Smoke from domestic fires and emissions from cars enter the atmosphere, but there is no wind to carry them away. Similar problems occur in winter in the South Island centres of Alexandra, Timaru, Richmond and Nelson. In 2005 Christchurch’s local authority passed by-laws banning open fires, and was phasing out old log burners in favour of clean-burning models.
Using this item
Photograph by Mike Freeman
This item has been provided for private study purposes (such as school projects, family and local history research) and any published reproduction (print or electronic) may infringe copyright law. It is the responsibility of the user of any material to obtain clearance from the copyright holder.