She wryly advised readers to protect themselves by not breathing. About 20 million people live in the Mexico City area, one of the biggest urban concentrations on the planet. MEXICO CITY ...

An influx of Californians and other Americans has made its way to Mexico City, angering some locals who say they are gentrifying the area ... Universal Images Group via Getty Bustos later posted ...

with mansions and slums often only separated by a wall THESE dramatic aerial images reveal the stark divide between the rich and poor who live just yards apart in Mexico City. The extreme wealth ...