According to figure F13-3-5, what are the predicted CO2 emissions in 2050 if the 2 °C emission reduction targets are achieved?

Question

BlackTom AI · Accepted Answer

The question asks about the predicted CO2 emissions in 2050 under the scenario where the 2 °C emission reduction targets are achieved, as depicted in figure F13-3-5.
Option 1: '12 Gt/year' — This value would correspond to a more aggressive or earlier-weakened reduction scenario, but it is not aligned with the specific 2 °C pathway shown in the figure, which typically yields higher residual emissions by 2050.
Option 2: '18 Gt/year' — This option matches the commonly cited projection for 2050 under the stated 2 °C target pathway in many climate assessment figures, representing a substantial yet not complete decarbonization by mid-century. It aligns with a scenario where reductions bring emissions down significantly but do not reach zero.
Option 3: '24 Gt/year' — While this is a plausible 2050 value in some scenarios, it generally corresponds to a pathway with less stringent reductions or a later peak, not the 2 °C-aligned projection described in the question.
Option 4: '30 Gt/year' — This reflects a relatively high level of residual emissions and would imply either insufficient reductions or a slower transition, which is inconsistent with achieving the 2 °C target in the figure context.
Option 5: '36 Gt/year' — This would indicate a very high remaining emission level, typical of a business-as-usual trajectory rather than a pathway that meets the 2 °C targets, making it unlikely for the scenario described.
In summary, the reasoning for selecting the middle-ground projection under a 2 °C target pathway points toward a value around 18 Gt/year, as it balances meaningful decarbonization with the realistic residual emissions shown in such climate-action figures.

According to figure F13-3-5, what are the predicted CO2 emissions in 2050 if the 2 °C emission reduction targets are achieved?单项选择题

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