Houston, We've Solved a Problem

A bird flying over Houston, Texas, sees only a sprawling canopy of trees. It seems the perfect nesting place for creatures both avian and human alike; unfortunately, the green ends at the tree line. All of those leafy branches shade a city that appears to care little for sustainable design, with cars that chug gas by the low-mileage gallon and oversized houses that dominate the persistently expanding cityscape.