Mexico City smog hurting people’s sense of smell
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Chronic pollution in Mexico City, which stains the sky yellow and can trigger government warnings to stay indoors, could be killing off residents’ sense of smell, scientists say.
Tests showed people in Mexico City — a sprawling metropolis crammed with around 20 million people and 4 million cars — struggled to sniff out everyday odors like coffee and orange juice compared to residents of a nearby town.