27 Feb '13, 7pm

Smog-forming emissions from U.S. power plants have been declining for 20+ years

Smog-forming emissions from U.S. power plants have been declining for 20+ years

The decline in emissions is due primarily to an increasing number of coal-fired units retrofitted with flue-gas desulfurization (FGD), or scrubbers, to coal plants switching to lower sulfur coal, and to selective catalytic reduction (SCRs), selective noncatalytic reduction (SNCR), or low NOx burners to limit NOx emissions. In recent years the decreased use of coal for electric power generation because of cheaper natural gas has also played a significant role in the SO2 and NOx emissions declines. (

Full article: http://www.treehugger.com/environmental-policy/smog-formi...

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