Oxfam has launched its largest ever global campaign following its report warning that spiralling food prices and global climate change risk undoing decades of progress in the fight against hunger.

The campaign aims to expose the governments and corporations that support and profit from what Oxfam calls the “broken food system”.

In a statement released today, Jeremy Hobbs, executive director of Oxfam, 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.”

The Indian and US governments were openly criticised for policy shortcomings which exacerbate global hunger, while three corporations, Archer Daniels Midland, Bunge and Cargill, “who control an estimated 90 percent of the grain trade,” were accused of market manipulation and profiteering.

The humanitarian group calls this a “new age of crisis” in which dwindling resources and the severe impact of global climate change will lead to more malnutrition.

Oxfam warns that staple food prices will more than double over the next 20 years, pressurising the poor who in some areas already spend 80 percent of income on food and raising the need for food aid.

“Spiralling food prices and endless cycles of regional food crises will create millions more hungry people unless we transform the way we grow and share food,” read the statement.

Oxfam has rallied the support of world leaders and international celebrities to raise awareness of the new campaign.

Former President Lula da Silva of Brazil said: “There are no excuses. We have the capacity to feed everyone on the planet now and in the future. If the political will is there no one will be denied their fundamental human right to be free from hunger.”

Hobbs is looking to the world’s most powerful governments to spearhead change, saying: “G20 governments meeting in France this year must now kick-start the transformation of our global food system.”