Urban intensification and policies to reduce GHG emissions : an analysis of the Productivity Commission ’ s argument

1. Evidence shows that increasing residential density can reduce vehicle use in some situations. But it also shows that local factors other than density are at least as important in influencing travel behaviour. (F 8.9) 2. Evidence on the proposition that higher-density cities in New Zealand are more environmentally sustainable is ambiguous at best. (F8.10) 3. Before attempting to use urban planning as a means of reducing GHG emissions in New Zealand, a more robust empirical research base should be developed reflecting New Zealand circumstances. Specifically, research should aim to improve the government’s understanding of local factors that shape urban GHG emissions in New Zealand, and the extent to which urban planning can influence these factors. (R8.2)