Cold Hubs from Nigeria is awarded as Special Prize category winner, a special award for projects that contribute to the seventh sustainable development goal (SDG 7) of the United Nations: affordable and clean energy for all, in Berlin, Germany, on March 20, 2017. The winners of first-ever international Start up Energy Transition Award sponsored by the German Energy Agency (DENA) were announced in Berlin on Monday. Awards in six categories were granted to start-ups from France, Germany, India, Bangladesh and Nigeria. (Xinhua/Yan Feng)