Contained herein are links to a number of news articles, that appeared in national newspapers, concerning the  threat to global food security, caused by the interrelated problems of peaking oil supplies, biofuel production, climate change, the meat industy and human population growth. 

Guardian, December 02 2003, George Monbiot
Bottom of the barrel: The world is running out of oil - so why do politicians refuse to talk about it?
This is an old article but I have added a link to it here because it contains an excellent quote from Monbiot, which is very relevant to permaculture design:

"The only rational response to both the impending end of the oil age and the menace of global warming is to redesign our cities, our farming and our lives."

I like to use this quote in tandem with another by Andy Goldring from the Permaculture Association:

“We already know about city farms, but now we need to go further, and
think of cities as farms.”
 (ref Permaculture and Energy, Reforesting Scotland 35, Autumn / Winter 2006.)

Guardian, March 26 2008, Catherine Early
Urban Jungle

Times, March 07 2008, Lewis Smith and Francis Elliott
Rush for biofuels threatens starvation on a global scale

Guardian, March 07 2008, James Randerson
Food crisis will take hold before climate change, warns chief scientist

Independent, March 08 2008, Geoffrey Lean
Rising prices threaten millions with starvation, despite bumper crops

Guardian, April 15th 2008, George Monbiot
Credit crunch? The real crisis is global hunger. And if you care, eat less meat

Guadian, Friday August 1 2008, Andrew Simms (New Economics Foundation)
The final countdown
Time is fast running out to stop irreversible climate change, a group of global warming experts warns today. We have only 100 months to avoid disaster. Andrew Simms explains why we must act now - and where to begin. Includes content on peak oil, Cuba, and local food.