From the Document: "Many governments hold that environmental degradation and climate change pose international and transboundary risks to human populations, economies, and ecosystems. To confront these challenges, governments have negotiated various international agreements to protect the environment, reduce pollution, conserve natural resources, and promote sustainable growth. [...] The United States and other industrialized countries have committed to providing financial assistance for global environmental initiatives through a variety of multilateral agreements, including the Montreal Protocol (1987), the U.N. Framework Convention on Climate Change (1992), and the U.N. Convention to Combat Desertification (1994). International financial assistance takes many forms, from fiscal transfers to market transactions. It may include grants, loans, loan guarantees, export credits, insurance products, and private sector investment."
CRS In Focus, IF10144
Congressional Research Service: https://crsreports.congress.gov/