“低碳经济”提出的大背景,是全球气候变暖对人类生存和发展的严峻挑战。随着全球人口和经济规模不断增长,能源使用带来的环境问题及其诱因不断地为人们所认识,不止是烟雾、光化学烟雾和酸雨等的危害,大气中CO2浓度升高带来的全球气候变化也已被确认为不争的事实。低碳经济的起点是统计碳源和碳足迹。碳足迹(Carbon Footprint)是指企业机构、活动、产品或个人通过交通运输、食品生产和消费以及各类生产过程等引起的温室气体排放的集合。它描述了一个人 “Low-carbon economy ” put forward the background of global warming is a serious challenge to human survival and development. As the world’s population and economy continue to grow, the environmental problems associated with energy use and their incentives continue to be recognized, not only as a result of smog, photochemical smog and acid rain, but also the global climate brought by the elevated atmospheric CO2 concentration Change has also been recognized as an indisputable fact. The starting point for a low-carbon economy is the measurement of carbon sources and carbon footprints. Carbon Footprint refers to the collection of greenhouse gas emissions caused by enterprises, activities, products or individuals through transportation, food production and consumption, and various types of production processes. It describes a person