The trade with international emission rights allows the states to buy and sell emission rights among themselves. The contracting parties of the Protocol are permitted to reduce their emissions of the confirmed and allotted amount and therewith to alienate parts of their reduction to other contractual partners.
If any convention party needs additional emission allotments, those can be acquired in form of certificates from other parties who want to sell their excessive capacity.
Industrial states with further increasing emission emergences can meet their greenhouse gas limits by buying rights from other countries, where the emissions could be reduced demonstrably or decreased for other comprehensible reasons.
The international association of CDM- and JI-projects for the reduction of greenhouse gases with the european (EU) emission trade for EU-businesses is controlled by instructions, regulations, and control mechanisms of the respective states.
The licensing procedure for such projects considers the consequences in the ecological, economical, and social sectors and is part of the pre-test for the approval process.