Jawapan

2016-03-16T13:14:43+08:00
The air around us is a mixture of gases, mainly nitrogen and oxygen, but containing much smaller amounts of water vapor, argon, andcarbon dioxide, and very small amounts of other gases. Air also contains suspended dust, spores, and bacteria.
2016-03-16T13:16:02+08:00
78% nitrogen, 21% oksigen, 0.97% gas nadir dan bahan2 lain, 0.03% karbon dioksida.