US power plant operators will instal 110 pollution-control devices over the next decade, potentially spending more than USD 5 billion, to curb ground-level ozone levels in the eastern US, according to a new Energy Argus report based on exclusive data. Selective catalytic reduction (SCR) units, already installed on 18 coal-burning power plants, cut emissions of harmful nitrogen oxides by 75–80%. Under sunlight, nitrogen oxide turns into smog. Federal clean air rules are forcing coal plants in the Midwest and SE to reduce nitrogen oxide output sharply beginning in May 2004. Utilities are expected to instal the bulk of these new devices by then.
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