sewage contain the following quantity of dissolve carbon dioxide
20-96ppm
70-90ppm
170-90ppm
6.9-7.3ppm
1

1 thought on “sewage contain the following quantity of dissolve carbon dioxide<br />20-96ppm<br />70-90ppm<br />170-90ppm<br />6.9-7.3ppm<br />1”

1. Answer:

   ya carbon dioxide is very harmful to us our need to protect from them

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