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Results are successfully used in European air pollution agreements since 1994, when the 2nd Sulphur Protocol was signed in Oslo, the first effects-based protocol to the LRTAP Convention

CCE Environmental Impact Assessment (CCE-EIA) methods include the computation of maximum allowable thresholds of air pollution for the protection of biodiversity. These thresholds are called "critical loads". Adverse effects occur when critical loads are exceeded by atmospheric deposition of compounds such as sulpur, nitrogen and heavy metals. Protection levels can change as function of climate change. The focus is currently on effects of excessive nitrogen deposition.

last update 05 Jun 2013

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