Environment
Mexico City Looks for New Ways to Tame Air Pollution
The city has made strides in clearing up its notorious smog, but progress has stalled in recent years.
MEXICO CITY—With more than 20 million people living in its metropolitan area, a geographical bowl ringed by mountains, Mexico City has long struggled with air pollution. At times during the past two years, ozone concentration levels in the city reached such extreme levels that officials issued environmental risk alerts, urging people to stay indoors.
If the past is any indication of the future, 2018 could again be grim.