User talk:Asi hassan

Ozone Layer 

Ozone or trioxygen molecule,consisting of three oxygen atmos.It was first discovered by Christian Friedrich in 1840,who was named by the Greek verb ozein.οόΌ

In response to your feedback
Here you go: Ozone Layer :)

— Ross coolguyCVU &#124; 22:18, 20 January 2013 (UTC)

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