Water is the quintessential paradox of Los Angeles. For many years, the water system in arid and drought-prone L.A. has relied on water pumped in from exterior sources at nice financial, social, and environmental expense. However the water it will get at no cost—via rain and snowmelt off close by mountains—is principally ignored and despatched flowing speedily via its stormwater ...

Till lately, the land under an elevated Metro line in Miami was little-used, wasted city house. Now it’s turning into a park, with the primary stage of the Underline—a 10-mile-long house for bikes and pedestrians in a car-centric metropolis—having opened. “It’s reimagining 10 miles, or 120 acres, of principally useless house beneath Metro rail,” says Meg Daly, founding father of ...