A Top Source of Lead Pollution Faced Tighter Rules. Then Trump Intervened. | The president exempted a copper smelter in Arizona from air-quality rules. An E.P.A. official guided the company that sought the exemption, emails show.
https://www.nytimes.com/2025/12/26/climate/copper-smelter-arizona-pollution-trump.html?unlocked_article_code=1._k8.mGR_.w5pGvTpzKsT4
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