The goal of the National Trust EcoFund is managing funds provided under debt-for-nature and debt-for-environment swaps, funds generated from international trade with greenhouse-gas Assigned Amount Units (AAUs), from sale of aircraft greenhouse-gas emission quotas, as well as funds provided under other types of agreements with international, foreign or Bulgarian sources aimed at environmental protection in the Republic of Bulgaria. The Fund contributes to the implementation of the Bulgarian Government environmental policies and the enforcement of its international commitments in this field.