- 20 May 2017
Image copyright Getty Images Image caption The Svalbard Global Seed Vault took 12 months to build and opened in February 2008
Norway is boosting the flood defences of its Global Seed Vault on the Arctic archipelago of Svalbard after water entered the entrance tunnel last year.
The storage facility, deep inside a mountain, is designed to preserve the world’s crops from future disasters.
Unseasonably high temperatures last year caused the permafrost to melt, sending water into the access tunnel.
No seeds were damaged but the facility is to have new waterproof walls in the tunnel and drainage ditches outside.
The vault stores seeds from 5,000 crop species from around the world. Dried and frozen, it is believed they can be preserved for hundreds of years.
Although most countries keep their own supplies of key varieties, the Global Seed Vault acts as a back-up.