Mexico City smog
Valle de México, Mexico · 19.43°, -99.13° · Air pollution
A megacity in a high mountain bowl where ozone and particulates get trapped over 20 million people.
Mexico City sits at 2,240 m inside a basin ringed by mountains, so pollutants from millions of vehicles and factories are trapped and cooked into ozone by strong sunlight. Declared the world's most polluted city in 1992, it has since improved markedly through fuel standards, 'Hoy No Circula' driving restrictions and public transit, though ozone remains a problem.
In the game
Mexico City smog flares up as Toxic air. The fix is a gesture: tap when the ring hits the green zone. Done right, it becomes Air cleared 🌤️. Finish all three steps of its chain in one round for a combo, or take your time in Explore mode: a place you fully restore stays green on your map for good.
🧭 Fly there and restore it▶ Play a 60-second round