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
The mountain air was so pure that it felt invigorating to breathe in.
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.
No, but since carbon dioxide is everywhere in the air around us it is very hard to obtain pure water.