Green bonds provide financing for clean energy, mass transit, and other low-carbon projects that can help countries adapt to and mitigate climate change, while giving investors high-quality credit, and fixed-income investment opportunities. In a recent article, the World Bank notes that in 2013 it mobilized over US$5.3 billion through 61 green bond transactions in 17 currencies, and the International Finance Corporation (IFC) issued US$3.4 billion in green bonds, including two US$1 billion issuance. The Bank also points to the adoption in January 2014 of the Green Bond Principles by a consortium of investment banks. The Principles aim to serve as voluntary guidelines on the development and issuance of Green Bonds, encouraging transparency, disclosure and integrity. At the World Economic Forum in Davos, World Bank Group President Jim Yong Kim called for doubling the global market for green bonds to US$20 billion by September, to coincide with the UN Secretary-General Climate Summit.