The Environmental Protection Agency (EPA) announced it will reassess the Mercury and Air Toxics Standards (MATS). It has issued a proposed revised supplemental cost finding for MATS and that the Clean Air Act required “risk and technology review.” After taking into account both the cost to coal- and oil-fired power plants of complying with the MATS rule — costs that range from $7.4 to $9.6 billion annually — and the benefits attributable to regulating hazardous air pollutant (HAP) emissions from these power plants (quantifiable benefits that range from $4 to $6 million annually), the agency said it is not “appropriate and necessary” to regulate HAP emissions from power plants under Section 112 of the Clean Air Act.
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