Carbon Bigfoot refers to a person with absolutely zero regard for his or her carbon footprint, the sum of all emissions of CO2 induced by your activities; an anti-environmentalist.

Carbon Bigfoot（碳大脚）指完全不在意自己碳足迹的人或者反环保人士。碳足迹指一个人的行为产生的二氧化碳排放量。

For example:

The elusive office Carbon Bigfoot appears to be Gary. The other day I watched him wad up 600 sheets of computer paper in pursuit of the perfect wastebasket three-point shot.

办公室里隐藏的“碳大脚”原来是Gary。有一天，我眼看着他把600张电脑打印纸揉成纸团对着垃圾筐练三分投篮。