What refrigerant is listed under the Kyoto Protocol?

R134a is listed under the Kyoto Protocol as it is classified among the greenhouse gases that the protocol aims to control due to its significant global warming potential. The Kyoto Protocol is an international treaty that commits its parties to reduce greenhouse gas emissions, recognizing the impact that certain refrigerants, including HFCs like R134a, have on climate change.

While other refrigerants are used widely, they are not all categorized under the protocol in the same manner. For example, R22, while known to have ozone-depleting characteristics, is primarily phased out under the Montreal Protocol rather than the Kyoto Protocol's focus on emissions reduction for climate change. R404A and R410A are also HFCs but were noted more in relation to regulatory discussions about phase-out and alternatives due to their high GWP, rather than direct listing under the Kyoto Protocol as concerns about their impacts developed later.

Thus, R134a stands out as a specifically recognized refrigerant in the context of the Kyoto Protocol for its contribution to global warming, necessitating awareness and responsible management to reduce emissions associated with its use.