In the first commitment period of the Kyoto Protocol, how many greenhouse-gas…
2022
In the first commitment period of the Kyoto Protocol, how many greenhouse-gas categories were covered for emission reduction?
Answer: C. 6 — Concept: A treaty's controlled-gas basket groups emissions by named gases and gas families. The category count is obtained by counting each gas or family…
- A.
4
- B.
5
- C.
6
- D.
7
Attempted by 1 students.
Show answer & explanation
Correct answer: C
Concept: A treaty's controlled-gas basket groups emissions by named gases and gas families. The category count is obtained by counting each gas or family listed for the relevant commitment period; it is not a count of individual chemical compounds within a family.
Application
For the Kyoto Protocol's first commitment period, Annex A listed carbon dioxide (CO2), methane (CH4), nitrous oxide (N2O), hydrofluorocarbons (HFCs), perfluorocarbons (PFCs), and sulfur hexafluoride (SF6). Counting these three named gases and three fluorinated-gas families gives 3 + 3 = 6.
Cross-check and contrast
Nitrogen trifluoride (NF3) was added for the second commitment period, so it is not included in the first-period count.
A count of 4 combines the three fluorinated-gas families into one category.
A count of 5 combines the three fluorinated-gas families into two categories.
A count of 7 adds nitrogen trifluoride, which belongs to the second commitment period.
Result: Therefore, the number of greenhouse-gas categories covered in the first commitment period was 6.