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on the environment

Formation of ozone

Last modified : Jun 26, 2007 10:46 PM
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Ground-level ozone or 'bad' ozone is formed when nitrogen oxides (NOx) 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 NOx and VOC.

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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.

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European Environment Agency (EEA)
Kongens Nytorv 6
1050 Copenhagen K
Denmark
Phone: +45 3336 7100