NEW YORK, NY - SEPTEMBER 22:  Special Envoy for International Water Affairs for the Kingdom of the Netherlands Henk Ovink (L) and Minister of Environment of Nigeria Amina J. Mohammed speak onstage at Global Citizen: The World On Stage at NYU Skirball Center on September 22, 2016 in New York City.  (Photo by Theo Wargo/Getty Images for Global Citizen)