Located in Western Kenya lies Lake Victoria, Africas largest and the world's second largest freshwater lake. The lake is home to over 200 species of fish, which are choking in water hyacinth, a weed that has covered over 10,000 hectares of the lake. Most aquatic life has been drastically affected. One Nigerian wants to change that story. Achenyo Idachaba is using the weed for a better cause.