I always try to say, 'If you want to help the environment, try to do just two things. One, use less of your car. Second, separate your garbage.'

There is little in the architecture of a city that is more beautifully designed than a tree.

If you provide good alternatives for public transport, you won't have traffic problems.

A lot of people assume that the expensive ideas are the most effective ones, but that is simply not true.

The city is not the problem; the city is the solution.

If you want creativity, take a zero off your budget. If you want sustainability, take off two zeros.

Cities are not problems. They are solutions.