... made in choosing the 'city areas' used, but there will be inevitable unresolved variations within theseareas. In order to quantify the uncertainty range, for the further analysis, the ... given in the mortality estimates, there are other factors whichmay need to be taken into account, which may be different in different parts of the country.One of these is the variability in particulate ... forChristchurch. The higher variability in Christchurch is probably due to the strong influence ofhome heating emissions that in turn depend on weather factors. Any trends in the data over the 4-6 year...