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Annual Mean Wet Sulfate Deposition 1989 through 1991. Annual Mean Wet Sulfate Deposition 2001 through 2003. Emission trading for No x (similar to SO 2 emission trading and carbon trading in the Kyoto protocol).
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Annual Mean Wet Sulfate Deposition 1989 through 1991
Annual Mean Wet Sulfate Deposition 2001 through 2003
Emission trading for Nox (similar to SO2 emission trading and carbon trading in the Kyoto protocol)