主要原因 Global Temperature and Carbon Dioxide 400 58.5 380 E 360 58.0 340 57.5 320 7000 Global Fossil Carbon Emissions 300 6000 57.0 8 CO,Concentration Total 280 Petroleum 5000 Coal 260 Natural Gas 4000 1880 1900 1920 1940 1960 1980 2000 Cement Production Year 3000 2000 1000 1800 1850 1900 1950 2000主要原因