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 of the coastline while helping to clean polluted water from the land. Thousands of marine species depend on seagrass for their survival. But seagrass is endangered by pollution and climate change. Researcher Idrissa Yussuf Hamad is trying to find solutions to this marine health challenge by using drone technology to map Zanzibar’s seagrass.