Globe and Mail: The world is getting to be a more urban place, with all that goes with it. According to data from the United Nations, about half of the planet now lives in an urban environment rather than a rural one, up from 30 per cent in 1960. That's going to increase even more, to about 60 per cent in a couple of decades, if the UN projections are correct. That's a lot of people living close to one another, and it is going to take a lot of resources to keep them satisfied.
As we get closer to that urban future,...