It stands for National Ambient Air Quality Standards. Standards set by the EPA that apply for outdoor air throughout the country. (See: pollutants, State implementation plans show.)
01:21, 27 November 2012
A machine that sorts organic from inorganic matter for ...
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Absorbed through the leaves of the plant, and ...
Potash is the only source of potassium fertilizer; there ...
MSDS: Material safety data sheet (MSDS) is a form ...
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