The amount of money that goes towards impact investing globally is far short of what is needed to meet the United Nations’ Sustainable Development Goals. Charitable institutions, donors, foundations and NGOs have long been the chief champions of impact investing, and the best bet is for the private sector to address the funding gap, experts say. Transparency and accountability in impact investing will make the space attractive to more investors, according to Fran Seegull, executive director of the U.S. Impact Investing Alliance, a New York City-based organization that aims to promote awareness of impact investing in the U.S. The Alliance also helps in the deployment of impact investments, and in creating an ecosystem for those investors.…