To accommodate the next 2 billion travelers on spaceship earth between 2010 and 2050, we will need to build 1 city of 1 million people every 5 days for the next 40 years. Read the Scientific American article.
Think we might need to tune up our industrial, design, production, and urban livabiltiy capacities, not to mention radically improve resource and energy productivity to support more people while reversing environmental impact and ultimately creating an environmentally restorative and wildly prosperous economy?