Climate change: UK food supply 'at risk'

A major supermarket has warned that climate change could threaten the UK's food supply chain.

The chief executive of Asda says it is one of the biggest issues facing his industry and that 95% of the supermarket's fresh produce could be affected by a lack of water as temperatures rise.

Almost half the food eaten in the UK is imported and problems with the supply chain could lead to increased prices.

Emma Simpson reports.