An idea presented in response to the Kyoto Protocol that involves the trading of greenhouse gas (GHG) emission rights between nations.

For example, if Country A exceeds its capacity of GHG and Country B has a surplus of capacity, a monetary agreement could be made that would see Country A pay Country B for the right to use its surplus capacity.

The Kyoto Protocol presents nations with the challenge of reducing greenhouse gases and storing more carbon. A nation that finds it hard to meet its target of reducing GHG could pay another nation to reduce emissions by an appropriate quantity.