London

EXTREME weather such as intense storms, droughts and heatwaves will cause more frequent and severe food shortages as the global climate and food supply systems change, British and American experts warned on Friday.

The pressure on the world's food supplies is so great, and the increase in extreme weather events so rapid, they said, that food shortages on a scale likely to occur once a century under past conditions may in future hit as often as once every 30 years.