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Presentation of Johan C.I. Kuylenstierna, Director of the Stockholm Environment Institute York Centre
It describe the main findings of an Integrated Assessment developed under UNEP and WMO on tropospheric ozone and black carbon. This has been put together by key experts around the globe, with Drew Shindell of NASA-GISS as the Chair of the Assessment and which has been coordinated by the Stockholm Environment Institute. Tropospheric ozone is ozone which is formed in the lower atmosphere – different from Stratospheric ozone layer. This ozone is not emitted but created in the atmosphere from emitted precursors, of which methane and carbon monoxide are important ones. Black carbon is emitted as particles of carbon – essentially the main compnent of soot. These substances warm the atmosphere and act as air pollutants and there has been a lot of interest recently in the potential for reducing climate warming by addressing these substances.