Unit of measurement based on number of particles.
1 Jim's voice said, They took air samples, measured in parts per million .
2 And just how many parts per million carbon dioxide are too many?
3 The United States allows 10 parts per million of DPA residues in food.
4 Atmospheric carbon dioxide has not dropped below 250 parts per million .
5 Sometimes the data were reported in percentages and sometimes in parts per million .
6 Transneft allows no more than 10 parts per million (ppm) of organic chlorides.
7 That corresponds to a rise in atmospheric carbon to 430 parts per million , or ppm.
8 He did not see things in parts per million .
9 Carbon dioxide now sits at 400 parts per million .
10 Many types of fish struggle or die when oxygen is below 5 parts per million .
11 Five of these patients received prolonged treatment with NO at 20 parts per million or less.
12 It is also continuing to rise at a rate of about two parts per million every year.
13 On the present course, it could be 800 parts per million by the end of the century.
14 He added: Already levels of CO2 have exceeded 400 parts per million .
15 But installing systems large enough make a dent in all those parts per million is functionally impossible.
16 Only a few parts per million of ammonia would be enough to offset the faint young sun.
Other examples for "parts per million"
Grammar, pronunciation and more
Translations for parts per million