Ajit Vadakayil: THERMAL COAL POWER PLANTS, CLEAN EXHAUST ...
National Ambient Air Standards are established to be protective of public health. The short-term standard (24-hour or daily average) is 35 micrograms per cubic meter of air (µg/m3) and the long-term standard (annual average) is 15 µg/m3. A microgram is a unit of weight. There are a million micrograms in a gram
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