Auckland is gradually weaning itself off car dependency, with a slight increase in commuters opting for public transport.

Now even prisons are being made environmentally friendly.

Auckland is growing by 50 people a day - they need 21 homes and bring in 35 additional cars. Now, a report warns of the pressures on the new-look Super City.

One of Auckland's oldest eyesores - the concrete sewer pipeline across Hobson Bay - is to join the city's list of 14,000 historic sites.

Treating effluent to make it reusable would not be economic, say experts.