According to Art Lerner-Lam, director of the Center for Hazards and Risk Research at Columbia University’s Earth Institute, assessing natural-disaster risk isn’t just a question of where and when cataclysmic events will occur, but how society adapts as bu
Mexico City, Mexico
Pop. 18 million.
Popcatepetl, 40 miles southeast of Mexico City, is a constant death threat. In 2000 the active volcano had its largest eruption in more than 1,000 years, causing 56,000 people to flee.