1. We all need to look for ways to reduce our carbon footprint. 我们都需要寻找减少我们碳足迹的办法。
2. The water-cooling scheme will reduce the system's carbon footprint by up to 85 percent. 水冷却方案将减少系统的碳足迹高达85%。
3. After all, even if profit is the motive, the net result is a reduction in the hotel's "carbon footprint". 毕竟，即使动机是利润，最终的结果也是减少了酒店的“碳足迹”。
4. Anyone taking all these flights over a year might rack up a carbon footprint totaling more than 35 tonnes. 一年中乘坐所有这些航班的任何人可能都会积累到总计超过35吨的碳足迹。
5. Now, researchers have a way for people to measure how much nitrogen pollution they produce—their nitrogen footprint. 如今，研究人员为人们提供了一种测量个人产生的氮污染量的办法——他们的氮足迹。
