The flat crop yields have affected food prices in the last five years

The demand for food will grow by 70 to 90 percent by 2030, developing a permanent crisis in food supplies, according to a report released by the charity.

The 'Growing a Better Future' report claimed that rising demand, flat crop yields and climate change had affected the international food situation and that unless world leaders take action to reform the global food system stable foods would more than double in price.

The news comes as the cost of food spiked for the second time in three years.

The U.N. Food and Agriculture Organization said food prices are higher than they have been in the last 20 years, surpassing the 2008 price spike that set off food riots in cities around the world.

Oxfam claimed that the demand for food would grow to staggering figures without even taking into account the impact of increasingly frequent droughts, floods and changes in agricultural patterns due to global warming.