The Tate Modern in London tossed up a show on Global Cities. As you can imagine the World is getting smaller and more cramped putting great strains on the environment as well as on everyone who has to navigate the increasingly burdened streets, subways and sidewalks. The photo is: Saõ Paulo: an apartment building for the wealthy overlooks a favela, ironically called Paraisópolis (Paradise city). Photo: Luiz Arthur Leirão Vieira.” And illustrates another aspect of our new Cities and that is the disparity between haves and have nots. The questions raised are compelling. One question is how optimistic should we be that we haven’t created problems s large and complex with mega-cities that we are reaching proportions where solutions are too complicated to implement. Check it: Tate Modern