Prices of agricultural commodity prices are to soar by up to 180% by 2030, unless governments take action to tackle the squeeze on food supplies presented by climate change and a growing world population.
The change in the world weather patterns, reflecting rising levels of greenhouse gases, "will have adverse effects" on both yields and output "across all developing regions", including some of the largest agricultural producing countries, Oxfam said.
"Climate change poses a grave threat to food production," the charity said, citing dangers to underlying yields and of droughts and floods "which can wipe out harvests at a stroke".
Estimates suggested that rice yields may fall by 10% for every rise of 1 degree Celsius in minimum temperatures during growing countries' dry season, with potentially "catastrophic" declines in yields in sub-Saharan Africa.
For more, see: Food prices to soar up to 180% as supplies tighten