The Guardian Global warming is exacerbating political instability as tensions brought on by food insecurity rise. With research suggesting the issue can only get worse we examine the risks around the world. Details here. Manitoba corn following a freak frost; Aug.'07 PLT photo PLT: As a Canadian, I'm getting quite tired of coverage such as this, concentrating on the US as centre of the universe, then radiating outward in any direction except Canada! The only reference I can find in this entire article to my country is this: "Canada will be a winner, as crops move north." Say what? I've lived most of my 70+ years on the Canadian prairies & the only crop "moving north" that I'm aware of is a rare disease of canola, purportedly carried north on the wind and thriving due to drought. (Kuz we had drought here, too, last summer!) As I look out my window this mid-April day, I see mounds of snow with more forecast. And I hear on the