City Hall in Nairobi - Kenya's capital - has become the first government building in Africa to be certified as a green building by the Word Bank's International Finance Corporation (IFC).

"An important milestone in Nairobi’s green city development," IFC Africa said.

Kenya Green Building Society CEO Nasra Nanda said Nairobi had set a new standard for urban development, emphasising the importance of sustainable practices in shaping the cities of the future.

At a ceremony to mark the occasion, Nairobi county governor Sakaja Johnson thanked everyone who made it possible for City Hall to reach the milestone.