As the World Economic Forum in Davos draws to a close, Business Editor Kate Moody gives us an update on the final day's agenda. The war in Ukraine and global food and energy security dominated discussions throughout the event. The head of the International Energy Agency (IEA), Fatih Birol, has told FRANCE 24 that it will be very difficult for Europe to move away from Russian gas because of its over-reliance on the country's supplies over the years.