International Climate Change Assistance: Budget Authority, Fy2009-Fy2019 [Updated November 25, 2019] [open pdf - 428KB]
From the Document: "The United States committed to providing financial assistance to developing countries for climate-changerelated activities through the United Nations Framework Convention on Climate Change (UNFCCC). The United States ratified the UNFCCC in 1992 with the advice and consent of the Senate (U.S. Treaty Number: 102-38). Among the obligations outlined in Article 4 of the UNFCCC, higher-income Parties (i.e., those listed in Annex II of the Convention, which were members of the Organization for Economic Cooperation and Development in 1992) sought to provide unspecified amounts of 'financial resources, including for the transfer of technology, needed by developing countries to meet the agreed full incremental costs of implementing measures' to meet their general commitments under the UNFCCC. [...] Over the past several decades, and to varying degrees, the United States has delivered financial and technical assistance for climate-change-related activities in the developing world through a variety of bilateral and multilateral programs."
CRS In Focus, IF10397
Congressional Research Service: https://crsreports.congress.gov/