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')http://www.bbc.co.uk/news/business-16391040
Imagine a world of spiralling food prices, water shortages and soaring energy costs.
For many living in the world today, this nightmare scenario is already a reality. Even for the well-off living in developed economies, it is becoming all too familiar.
And on current projections, it's going to get a whole lot worse. Short-term fluctuations in supply and demand aside, a global population explosion combined with finite resources means the planet cannot sustain ever-increasing levels of consumption using current models of production.
And there isn't much time to do something about it.
"The challenge we are facing over the next 20 years is unprecedented," says Fraser Thompson, senior fellow at the McKinsey Global Institute.





