UNEP Green Cities Report

UN say cities are green, need to be greener (pdf).  Cities provide higher standards of living, and more economic opportunity with less energy, materials, and land use.  They house 50% of the world’s people, but account for 60-75% of the world’s emissions, not because they’re inefficient, but because city dwellers are disproportionately rich.  Interesting data points: Tokyo and Paris dwellers emit half as much carbon as New Yorkers or Londoners.  São Paulo is as rich as Mexico City but with 1/3 the emissions.  Delhi is 1/3 as rich as São Paulo, but with the same emissions.