What is always present in the air?

Asked by 235491283778099 | 19th Aug, 2018, 03:10: PM

Expert Answer:

Air around us is a mixture of many gases and dust particles. It contains 78% nitrogen, 21% oxygen, 0.03% carbon dioxide and very small amounts of other gases. Air also contains a variable amount of water vapour.

Answered by Sheetal Kolte | 20th Aug, 2018, 12:31: PM