In 2010, the greenhouse gas emissions of Macao international aviation and aviation in special areas were about 449,000 tons of carbon dioxide equivalent, and the emissions of navigation in special areas were about 185,000 tons of carbon dioxide equivalent, which are listed as separate information items. In addition, about 56,000 tons of carbon dioxide from the combustion of biomass in municipal waste is also listed in the information item. The total amount of greenhouse gas emissions from the above activities is about 690,000 tons of carbon dioxide equivalent, which are not included in the total greenhouse gas emissions of Macao.