Annan, Sachs advocate for African 'green revolution' at panel By Katie Bentivoglio, Katie Bentivoglio, and Lillian Jin At a panel Monday night, former U.N. Secretary-General—and current Columbia University Global Fellow—Kofi Annan said that African needed to improve its crop yields to become self-sustaining. Read more about Annan, Sachs advocate for African 'green revolution' at panel Add new comment