Energy Choices & Security (id: de097dc17)

本题目来源于试卷: Energy Choices & Security，类别为 IB环境系统与社会

[单选题]
Figure: Movement of carbon thr9 n*u+n(7uk bgflt23sq 8(wzixtx xzvd.t55 cough the carbon cycle0 usdl,t96x0hi:oa :yyp gzmg+jxdt8u 5;7 eg


The burning of fossil fuels affects several carbon stores directly or indirectly. Calculate the annual increase in carbon levels (GtC yr

-1
) in the atmosphere.

A. 7.3 GtC yr -1
B. 5.5 GtC yr -1
C. 750 GtC yr -1
D. 4000 GtC yr -1


参考答案:  A


本题详细解析:
Only the flows of carbon into and out of the atmosphere need to be includavx,4w, ))b7l5)bnwo ifcpseed in the calculation. (60 + 60 7o4ase,blwb )w v)f5c),inpx + 1.6 + 92 + 5.5) - (121.3 + 90 + 0.5) = 219.1 - 211.8 = 7.3 GtC yr -1

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