Riots from Haiti to Bangladesh to Egypt over the soaring costs of basic foods have brought the issue to a boiling point and catapulted it to the forefront of the world's attention, the head of an agency focused on global development said Monday.

"This is the world's big story," said Jeffrey Sachs, director of Columbia University's Earth Institute.

"The finance ministers were in shock, almost in panic this weekend," he said on CNN's "American Morning," in a reference to top economic officials who gathered in Washington. "There are riots all over the world in the poor countries ... and, of course, our own poor are feeling it in the United States."

World Bank President Robert Zoellick has said the surging costs could mean "seven lost years" in the fight against worldwide poverty.

"While many are worrying about filling their gas tanks, many others around the world are struggling to fill their stomachs, and it is getting more and more difficult every day," Zoellick said late last week in a speech opening meetings with finance ministers.

"The international community must fill the at least $500 million food gap identified by the U.N.'s World Food Programme to meet emergency needs," he said. "Governments should be able to come up with this assistance and come up with it now."

The World Bank announced a $10 million grant from the United States for Haiti to help the government assist poor families.

"In just two months," Zoellick said in his speech, "rice prices have skyrocketed to near historical levels, rising by around 75 percent globally and more in some markets, with more likely to come. In Bangladesh, a 2-kilogram bag of rice ... now consumes about half of the daily income of a poor family."

The price of wheat has jumped 120 percent in the past year, he said -- meaning that the price of a loaf of bread has more than doubled in places where the poor spend as much as 75 percent of their income on food.