Rising sea levels due to climate change in the Gulf of Guinea are swallowing up large portions of Benin's coastline.

The United Nations says the West African country's coast has retreated by 400 metres in the last 40 years as the waters destroyed many homes there. 

Environmentalists say studies show the sea levels will keep rising by more than 50 centimetres, which would threaten to destroy the entire commercial capital Cotonou.
 
Jonah Hull reports from Benin, where many are fighting the giant waves.