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The Guardian - US
The Guardian - US
World
Erin McCormick, The Guardian, and Verónica García de León, Quinto Elemento Lab

Revealed: Mexico’s industrial boomtown is making goods for the US. Residents say they’re ‘breathing poison’

A cityscape is seen in the foreground, covered in smog with a large mountain seen in the background
The Monterrey metropolitan area, with the Sierra Madre in the background, is often marred by poor air quality. Photograph: El Norte

An industrial boom in a US manufacturing hub in Mexico is contributing to a massive air pollution crisis that is threatening residents’ health, according to new research by the Guardian and Quinto Elemento Lab.

The polluting facilities in Monterrey include factories that are operated by companies from around the world – including the US, Europe, Asia and Mexico – but export largely to the US.

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