In 2000, the domestic greenhouse gas emission in Japan was 1332 million tons of CO2, whichincreased by 8% in comparison with that of 1990. According to the Kyoto Protocol to the United NationsFramework Convention on Climate Change (COP3) held in December, 1997, Japan is obliged toreduce CO2 by 6%, compared with 1990. As a result, Japan is required to reduce by 14% (172 milliontons) on average during the period between 2008 and 2012. Particularly the emission in theresidential/commercial sector in 2000 was on the increase by 21.3%, compared with that of 1990.
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