Oxfam has warned that millions more people will go hungry in the coming decades due to depletion of the earth's natural resources and the impact of increasingly severe climate change.
The development and aid agency has said the world's most powerful governments must transform the way we grow and share food.
The organisation warns that the price of food staples such as maize - already at an all time high - will more than double in the next two decades.
View images from Oxfam's GROW campaign
Chief Executive of Oxfam Ireland Jim Clarken said: 'Our world is capable of feeding all of humanity yet one in seven of us are hungry today.
'In this new age of crisis, as climate change impacts become increasingly severe and fertile land and fresh water supplies become increasingly scarce, feeding the world will get harder still.
'Millions more men, women and children will go hungry unless we transform our broken food system.'
East Africa, where 8m people face chronic food shortages, will see demand for food aid double in the next ten years.
Demand for food by 2050 will rise by 70%, but our ability to increase food production is declining.
Globally more than 925m people go hungry every day and a quarter of them live in India.
Its economy has doubled in size since 1990, but Oxfam says its hungry have increased by 65m. The country accounts for 42% of the world's underweight children.
Oxfam also wants the private sector to adopt a business model where profit does not come at the expense of poor producers, consumers and the environment.
Mr Clarken said: 'For too long governments have put the interests of big business and powerful elites above the interests of the seven billion of us who produce and consume food.
'Governments and global organisations must now push for the transformation of our global food system.'
