MADRID (AFP) - The food crisis, which sparked unrest in about 30 nations last year, is far from over despite a recent fall in prices for some agricultural goods, global humanitarian agency Oxfam warned Monday. "Decades of under-investment in agriculture coupled with the increasing threat of climate change mean that despite recent price falls, future food security is by no means guaranteed, and in fact the situation could get worse," it said. "Although global food prices have fallen in the last few months, they are not back to previous levels, and are likely to rise sharply again in the future," it added in the report called "A Billion Hungry People". Severe food shortages in Afghanistan, Ethiopia, Kenya, Mozambique and Zimbabwe were evidence that the global food crisis was far from over, it said. The Oxfam report was issued as representatives from 95 countries gathered in Madrid for a UN-sponsored meeting on food security, a follow-up to a summit held last year in Rome to tackle the food crisis. Nearly one billion of the world's 6.5 billion people currently suffer from malnutrition, according to the United Nations' Food and Agriculture Organisation (FAO), which is hosting the event together with Spain. Oxfam said governments must take urgent, coordinated action to implement long-term reforms and address immediate needs for those facing hunger. "World leaders have a window of opportunity to prevent a worse situation resulting from the triple crunch of the economic crisis, climate change, and energy and water scarcity," Oxfam agricultural policy expert Carlos Galian said in a statement. "Failure to act will see millions more people falling into hunger," he added. UN Secretary-General Ban Ki-moon and Spanish Prime Minister Jose Luis Rodriguez Zapatero will close the Madrid meeting on Tuesday. Meanwhile, on the eve of a UN-sponsored summit in Spain on the global food crisis, the World Bank has said that millions around the world continue to suffer from volatility in food prices. Representatives from 95 countries gather in Spain Monday for a two-day follow-up meeting to the UN-sponsored summit held last year in Rome to tackle the global food crisis. The international community needs to increase efforts to help the poor of the world, World Bank Managing Director Ngozi Okonjo-Iweala said in a statement. "Food prices are now volatile and that factor, combined with the impact of the financial crisis, only serves to heighten the challenges confronting the developing world," Okonjo-Iweala said. Bank economists "expect high price volatility to continue and it will hit the poorest the most, as they spend half their income on food," she said. "More needs to be done as we must ensure those who are vulnerable get the assistance they need." Okonjo-Iweala is leading the World Bank's delegation to the meeting in Madrid. Member states of the UN Food and Agriculture Organization agreed at the summit in Rome to reduce the number of people who live in hunger by 2015, but this goal is accompanied by limited financial donations. Over the past seven months, the Bank, "through its Global Food Crisis Response Program, reached over 13 million people directly through food distribution systems, cash for work initiatives, and seed and fertilizer distribution to small holder farmers," the statement read. The Bank said that it was "disturbing" that poor countries, "especially in Africa, did not have matching drops in their food prices." They gave as an example maize prices dropping 32 percent over the past quarter, but dropping only by one percent in Mombasa, Kenya. UN Secretary General Ban Ki-moon and Spanish Prime Minister Jose Luis Rodriguez Zapatero will preside over the closure of the Madrid conference, which is expected to end with a statement outlining specific measures to be adopted to fight hunger around the world. The World Bank worked with UN agencies to help the world's neediest when food prices soared in 2008, the statement said.