The Yemeni mother of six told the international aid group Oxfam that she has now resorted to begging because food prices are so high This year 's severe weather events have led to low yields in grain producing countries . Canadian prairie farmer Donn Teske says extreme weather events are becoming much more extreme . Aid group Oxfam believes there may be another spike in food prices in early 2013 and longer term volatility . Some countries like Nigeria are looking for alternative staple crops such as cassava .
This year 's severe weather events have led to low yields in grain producing countries . Canadian prairie farmer Donn Teske says extreme weather events are becoming much more extreme . Aid group Oxfam believes there may be another spike in food prices in early 2013 and longer term volatility . Some countries like Nigeria are looking for alternative staple crops such as cassava .