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介 城市中文名称： 城市英文名称：Sheppards 州或国家代码：GA (US) 国家中文名：美国 国家英文名：United States 纬度：32°38'00.00"N 经度：81°32'00.00"W
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So given all the things the Sheppards are doing, how much carbon dioxide are they producing?
NPR: North Carolina Family Takes Carbon Challenge
He has come to the Sheppards' home to assess their carbon footprint.
Those trips account for 12.7 metric tons of carbon emissions per year and essentially double the amount of carbon the Sheppards put into the air.
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