The Environmental Protection Agency is debating waste-handling rules that could affect the use of fly ash, a byproduct of coal plants that has found its way into many “green” building products such as wallboard, concrete and bricks. As a replacement for cement, recycled fly ash reduces carbon emissions normally generated by cement production. The EPA is apparently trying to get a handle on a patch work of state waste-handling regulations in an effort to prevent toxic spills, such as one that occurred at a coal-fired TVA power plant in Kingston, Tenn., in 2008. Construction industry pundits worry that classifying fly ash as “hazardous waste” could cause clients to shy away from materials incorporating it. For more:
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