Useful links
http://bonnsustainabilityportal.de/?p=41130
https://en.m.wikipedia.org/wiki/Fuel_cell#Boats
https://en.m.wikipedia.org/wiki/Fuel_cell
http://www.clean-energy-bonn.org/downloads/HydraandSubmarine.pdf
https://setis.ec.europa.eu/about-setis/technology-map/2011_Technology_Map1.pdf/view
http://www.africa-adapt.net/en-us/news-events/267/
https://www.researchgate.net/publication/289373038_Bonn_Climate_Project_Clean_Energy_for_infrastructure_measures_in_developing_Countries https://www.arts.uni-bonn.de/arts-events/december-2015