Secretary of State Hillary Clinton will use the big United Nations Conference on Sustainable Development in Brazil as the platform to announce a new mechanism for financing green energy in Africa.

"The announcement will be made in conjunction with Elizabeth Littlefield, President and CEO of the Overseas Private Investment Corporation (OPIC). The mechanism plans to align different types of U.S. financial support to catalyze higher levels of private sector investment in clean energy projects, primarily in Africa," an advisory states.