If you click on the world grain output above in (pdf) for the last few years you can see there is no longer really a surplus like there used to be concerning most grains.
When you add to that the following article:
You begin to see the problem for poorer nations trying to feed their nations.
Begin quote from 'recipe for disaster' news article above."As a result of climate change, the yields in certain regions of sub-Saharan Africa are expected to fall by 50 percent by 2020 in comparison to 2000 levels. And growing frequency and intensity of floods and droughts contribute to volatility in agricultural markets."
"Current agricultural developments are ... threatening the ability for our children?s children to feed themselves," he said. "A fundamental shift is urgently required if we want to celebrate World Food Day next year," he added. end quote.
As a result of up to a 50 % drop in grain yields in many areas hunger and starvation can only increase over the next 10 years in many countries.This will tend to destabilize even more many of the poorer nations on earth that are affected by severe climate change because most of these countries rely almost exclusively on rain not irrigation because irrigation often is just not available. so in these times of floods, droughts and unexpected weather this 50% drop in productivity in growing grains will tend to destabilize many more countries and create even more panic than now internationally over the next 10 years or more. Unless irrigation or other methods are used to increase crop yields this could continue to get worse in these areas.