What Three Decades of Advancing Clean Air Taught Us—and Where We Go from Here Valerie Hickey June 04, 2026 This page in: English © 2026 The World Bank Group,

https://blogs.worldbank.org/en/climatechange/what-three-decades-of-advancing-clean-air-taught-us-and-where-we In 1990, facing a public health crisis, Mexico City initiated its first multiyear air quality management strategy, significantly reducing lead and sulfur emissions. These results were driven by a regional-focused approach, key regulatory reforms, and investments in data monitoring – all geared toward ensuring sustained and measurable impact. © 2026 The World Bank Group,