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You are here: Home / Environmental topics / Air pollution / Air quality levels in Europe / More about air pollutants / Ozone / About ozone / Formation of ozone

Formation of ozone

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Last modified : Jun 26, 2007 10:46 PM

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Ground-level ozone or 'bad' ozone is formed when nitrogen oxides (NO_x) and volatile organic compounds (VOC), collectively called 'ozone precursors', react with sunlight. Emissions from car exhausts, power plants and industrial facilities are the major sources of NO_x and VOC.

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Project in the spotlight: The Air Implementation Pilot is a pilot project undertaken jointly by the EEA and the European Commission. It focuses on gaining a better understanding of what cities need in order to better implement EU air quality legislation.; More about this project

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