Not to be confused with Peter Hall's chronicle of urban planning movements since 1880, although reading it would be a nice accompaniment to this documentary directed by Elena Brunello. Global warming caused by human beings is changing our climates as we speak. 70% of the world's population live in cities. 70% of pollution stems directly from them. The carbon footprint of inner city residents is substantially higher than of non urban residents due to rampant, capitalism-driven resource use and modern shifts away from walkable and cyclable neighbourhoods. It's confronting and hard to watch mounting evidence of the costs of those…