The "15-minute City" is an urban planning concept where your main daily needs are a close walk, bike or transit ride from home. It could also help limit global warming, but it faces major obstacles.

Imagine waking up in your apartment, noticing you need a carton of eggs or a container of milk, and heading to the grocery store — on foot or by bike because it doesn’t really matter. Either way, it ...

PARIS — In the 11th arrondissement, a middle-to-working class neighborhood in the east of Paris, if you walk out your front door, you can arrive at a preschool in one minute. A bookstore in three ...