Rotary Portland cement kiln. Image credit:Wikimedia.

I doubt if any other nation regulates mercury emissions from cement kilns the way USA is about to. USEPA’s just-announced progress on this front took a decade of work, several lawsuits by activists, a new EPA Administrator willing to obey the law, and a new Congress that doesn’t (yet) bow to lobbyists and interfere with EPA. With all that build-up, the new, final USEPA cement kiln mercury control regulation is indeed a “sea change.” More about that down page

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