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Oxygen is very precious. We all living organisms take oxygen for breathing. If there will be no oxygen then we will not be able to breath and if we will not breath we all will die. And it is important for nature also. Oxygen is a colorless, odorless, tasteless, gaseous chemical element with the chemical symbol O and atomic number 8. Air which is produced by plants.
Oxygen-- Oxygen is a colorless odorless gaseous element essential to life processes and to combustion. We need it to breathe

Nature -- 
Nature never end we have to respect your environment. make a great full nature for your chid future