However, the lack of clarity about the distinction between climate change and development is one of the factors that has led to distrust between developed and developing countries, fuelled by concerns about additionality and the potential for competition between climate finance and development finance for a limited amount of international public finance. Development finance in the form of Official Development Assistance (ODA) increased steadily from the end of the 1990s up to 2010. In 2015, net official development assistance (ODA) flows from member countries of the Development Assistance Committee (DAC) of the OECD totalled USD 131.6 billion.