Indicators of the human influence on the atmosphere during the Industrial Era (a) Global atmospheric concentrations of three well mixed greenhouse gases 36o Carbon dioxide 1.5 1. 0.5 GO0 26o 地 175 Methane 赇工 1500 .4 1250 o.3 .2 1。。o 环业 .1 75o Oo 境革 310F Nitrous oxide o.15 .10 发命 29o o.05 生以 27 Oo 250 的来 1400 1 600 1 800 变 (b) Sulphate aerosols deposited in Greenland ice 200F Sulphur 化 So 100 6oo 1 800 Ooo Year5 工业革命以来， 地球环境发生的变化