Kammala wannan jumla: An gabatar da tsarin alƙawarin da aka yi da yardar rai inda jihohi ke yin nasu tsare-tsaren rage fitar da hayaki a shekarar 1991, amma an yi watsi da shi kafin yarjejeniyar Kyoto ta 1997, inda aka mai da hankali kan tabbatar da yarjejeniya don burin fitar da hayaki "daga sama zuwa ƙasa". An sake farfado da tsarin a Copenhagen, kuma ya sami karin haske tare da Yarjejeniyar Paris ta 2015, kodayake an kira alkawurran da aka ba da gudummawar kasa (NDCs). Wadannan ana nufin a sake gabatar da su a cikin ingantaccen tsari kowane shekaru 5. Har ila yau, ba a san yadda wannan tsarin zai kasance da amfani ba. Za a fara gabatar da NDCs na farko na ƙasashe a 2021
Taron Glasgow. Akwai shirye-shiryen amincewa da tsarin kasa da kasa don cinikin farashin carbon, a taron Glasgow COP na 2021.