In This Series
'Dialogue of Cities' aims to deliver creative jolt.
Cities, slums and 'The Sketches of Frank Gehry.'
Peak oil doomsayer James Howard Kunstler on the mega-impact here.
DAY THREE: Poorer nations suffer for our excesses.
Stats show city isn't countering flight to suburbs.
Bogota's Enrique Peñalosa's happy 'war on cars.'