Hindou Oumarou Ibrahim is the co-chair of the International Indigenous Peoples Forum on Climate Change and a key leader in the fight to mitigate the disastrous effects of Lake Chad’s disappearance. An estimated 30 million people in the West African countries of Chad, Nigeria, Cameroon, and Niger depend on the lake. She and 12 other women leaders appear in Vogue for their leadership during the COP 21 climate negotiations in 2015 in Paris, France. Photo credit: Inez van Lamsweerde and Vinoodh Matadin