NO.PZ2022120703000020
问题如下：
Which of the following statements is most accurate? An emission trading system:
选项：
A.sets an explicit price on greenhouse gas emissions.
B.mandates similar levels of emissions reductions for all actors.
C.creates an economic incentive for emissions reductions to occur at the point of least cost.
解释：
C is correct?because "an ETS emission trading system is a system based on the exchange of permits for emission units, where actors who exceed their emissions limits are required to buy permits from those that have emitted less. The overall quantity of emissions is fixed, and market mechanisms are used to set their price. In theory, this creates an economic incentive for emissions reductions to occur at the point of least cost; rather than mandating similar levels of reductions for all actors, price discovery helps reward those that can afford to reduce more."
A is incorrect because "carbon taxation takes a different approach compared to ETS by directly setting an explicit price on GHG emissions (e.g. per tonne of CO2)."
B is incorrect because an ETS "creates an economic incentive for emissions reductions to occur at the point of least cost; rather than mandating similar levels of reductions for all actors, price discovery helps reward those that can afford to reduce more."
这道题可以用中文解释一下吗
