Seagrass contributes to the conservation of Zanzibar’s biggest tourist attractions: the pristine beaches and the clear water. The marine plants act as barriers to the waves and reduce the erosion on the coastline while helping to clean polluted water from land. Thousands of marine species depend on seagrass for their survival. But seagrass is endangered by pollution and climate change. Researcher Idrissa Yusef Hamad is trying to find solutions to this marine health challenge by using drone technology to map Zanzibar’s seagrass.