During an international climate agreement, a new greenhouse gas was added to the list of regulated gases because of its extremely high global warming potential and increasing use in the electronics industry. Which of the following gases was added during the second commitment period of the Kyoto Protocol (Doha Amendment)?

The gas added during the second commitment period through the Doha Amendment was nitrogen trifluoride.

Methane was already one of the six gases controlled in the first commitment period, not a new addition.

Nitrous oxide too was among the original six gases and was not newly added at Doha.

Nitrogen trifluoride was added because it has an extremely high global warming potential and rising use in electronics manufacture.

Carbon dioxide was the foremost gas covered from the start and could not be a fresh addition.

With this seventh gas the Doha Amendment expanded the list to strengthen emission control.