No, due to pollution the composition of air changes due to industrial emission,automobile exhaust .
reason for air is not pure
air is not pure
air around us is not pure because in air so many gases are mixed like nitrogen , oxygen , carbon etc.
No
no
no
Air contains about 19-20% oxygen
I can't give a full Biological reason but I was taught that it was to trap air and provide and insulating layer around the body
I can't give a full Biological reason but I was taught that it was to trap air and provide and insulating layer around the body
With today's kind of pollution. It's not anymore.
Air is not a pure substance.
No, but since carbon dioxide is everywhere in the air around us it is very hard to obtain pure water.