It remains undecided just how much money Germany might put behind the Tropical Forests Forever Facility (TFFF), which hosts Brazil are unveiling in hopes of attracting $125 billion in government commitments and private investment around the global UN climate gathering in the Amazon.

The sources said that German Chancellor Friedrich Merz finds the TFFF financing initiative interesting, and wants to support Brazil and demonstrate Germany's continued commitment to multilateral climate efforts.

Merz is scheduled to meet Brazilian President Luiz Inacio Lula da Silva one-on-one during his trip to Brazil, sources in Berlin said on Thursday.

Brazil has pledged $1 billion to the fund in hopes of kickstarting commitments.

The proposed fund would make annual payments to developing countries for every hectare of forest they keep standing.

Germany is leaving the size of its financial contributions open for the time being, according to the sources.

A source said that precise details of how the massive World Bank-managed TFFF fund would work still need to be closely examined.