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最近,一系列科学研究证实,二氧化碳等温室气体排放与全球气候变化之间存在着直接的关系。工业革命开始前,大气中二氧化碳浓度基本维持在280ppm(1ppm为百万分之一)左右,现在已经上升到
Recently, a series of scientific studies have confirmed that there is a direct relationship between the emission of greenhouse gases such as carbon dioxide and global climate change. Before the beginning of the Industrial Revolution, the concentration of carbon dioxide in the atmosphere remained at about 280 ppm (1 ppm is 1 part per million) and has now risen to