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气候变暖的温室在人类历史第一次超过400ppm 人类历史上的第一次，气候变暖的二氧化碳在大气中的浓度已经通过了具有里程碑意义的水平，400ppm(每百万分之一）。最后一次这么多的温室气体在大气中是几百万年前，北极无冰、撒哈拉大沙漠还有草原分布、海平面比现在高40米。 这些条件在预计返回的时候对文明社会有毁灭性后果，除非燃烧煤炭、石油和天然气的二氧化碳排放量迅速削减。但尽管科学家的严重警告和重大的经济日益衰退，全球排放量还是持续飙升。 。。。 Global carbon dioxide in atmosphere passes milestone level Climate warming greenhouse gas reaches 400 parts per million for the first time in human history For the first time in human history, the concentration of climate-warming carbon dioxide in the atmosphere has passed the milestone level of 400 parts per million (ppm). The last time so much greenhouse gas was in the air was several million years ago, when the Arctic was ice-free, savannah spread across the Sahara desert and sea level was up to 40 metres higher than today. These conditions are expected to return in time, with devastating consequences for civilisation, unless emissions of CO2 from the burning of coal, gas and oil are rapidly curtailed. But despite increasingly severe warnings from scientists and a major economic recession, global emissions have continued to soar unchecked. ...... http://www.guardian.co.uk/enviro ... evel-greenhouse-gas |
