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'''Ozone''' is a chemical [[compound]] consisting of three [[oxygen]] atoms. It is represented by the symbol O<sub>3</sub>.
'''Ozone''' is a chemical [[compound]] consisting of three [[oxygen]] atoms. It is represented by the symbol O<sub>3</sub>.
It is unstable at standard temperatures and pressures, and a powerful [[oxidizer]]. At the earth's surface it occurs naturally as a result of electrical discharges, most prominently in the form of [[lightning]]. It is also created by [[man-made]] sparks, such as in an electrical motor.
It is unstable at standard temperatures and pressures, and a powerful [[oxidizer]]. At the earth's surface it occurs naturally as a result of electrical discharges, most prominently in the form of [[lightning]]. The majority of tropospheric ozone is created when the products of combusted [[fossil fuel]] such as [[nitrogen oxide]] and [[carbon monoxide]] react with sunlight.
In the stratosphere it serves a very important function, by acting to filter out most of the [[sun]]'s ultraviolet radiation.
In the stratosphere it serves a very important function, by acting to filter out most of the [[sun]]'s ultraviolet radiation.