A new international carbon market has been on the table since the Paris Agreement in 2015 but it has never been signed off.
Now, Negotiators at the COP26 climate summit in Glasgow are working frantically in a bid to get "Article Six" over the line.
New Zealand is in the room, and is desperate that limits are not placed on buying carbon offset from other countries.
RNZ's climate reporter Hamish Cardwell has the story.
