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 volatile organic compounds (VOCs) and the products of combusted [[fossil fuel]] such as [[nitrogen oxide]] react in the presence of strong sunlight. | 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 volatile organic compounds (VOCs) and the products of combusted [[fossil fuel]] such as [[nitrogen oxide]] react in the presence of strong sunlight. |