Home > Term: parts per million/parts per billion/parts per trillion
parts per million/parts per billion/parts per trillion
Expressed in p.p.m./p.p.b./p.p.t., these are measures of the concentrations of pollutants in air, water, soil, human tissue, food or other products.
- ส่วนหนึ่งของคำพูด: noun
- อุตสาหกรรม/ขอบเขต: Environment
- Category: Environment statistics
- Company: United Nations
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ผู้สร้าง
- J.Small
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