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【正文】 the main cause of the unusual global warming. The carbon dioxide footprint will reduce gram if you save a plastic will reduce 600 gram if you climb stairs under the fifth floor instead of taking lift. It will reduce 400 gram per kilogram if you chose fruits and vegetables on seasons. It will reduce 175 gram for a machine everday if you make your air conditoner one degree higher in tree can absorb carbon dioxide kilogram per year. As low carbon generations,college students is responsible to spread green concept to more and more people by work. turn off the puter when doesn39。s conscience of energy saving and environmental protection,th
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