Fishing boats on Lake Victoria, Africa's largest lake, trapped by a bloom of water hyacinths. ESA's Alcantara initiative is supporting a joint project by the University of Nairobi and TU Delft to develop a satellite-based early warning system to alert lake authorities to the growth of lake vegetation. Such infestations of which can obstruct navigation, fishing and hydroelectric power generation – as well as proving harmful to human health, encouraging mosquito breeding.