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Hong Kong Carbon Footprint Tootkit by City University of Hong Kong |
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My Carbon Footprint by the Hong Kong and China Gas Company Limited |
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One Tonne Challenge Calculator |
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ICAO Carbon Emissions Calculator for air travel at International Civil Aviation Organization |
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Calculation Tools for companies to develop inventories of their greenhouse gas emissions at The Greenhouse Gas Protocol Initiative |
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Carbon Calculator established by The Hongkong Electric Co. Ltd |
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Carbon Footprint Calculator For Individuals And Households by the Carbon Footprint Ltd. |