The National Trust Ecofund (NTEF) contributes to sustainable environmental protection and a better quality of life by implementing innovative holistic approaches and changing mindsets at the local and national levels.

NTEF manages funds and finances projects for environmental protection, energy efficiency, and addressing climate change.

The funds managed by the NTEF are provided under a Debt-for-Environment swap, an intergovernmental agreement from the trading of assigned emission units (AEUs) for greenhouse gases under Article 17 of the Kyoto Protocol, from the early auctions of the European Emissions Trading Scheme, from the sale of greenhouse gas emission allowances for aviation activities, as well as funds provided under other types of agreements with international, foreign or Bulgarian sources of financing intended for environmental protection in the Republic of Bulgaria.