Agence France-Presse: Rising food prices have hit Asia’s poor so hard that many have taken to the streets in protest, but experts see few signs of respite from the growing problem. An array of factors, from rising food demand and high oil prices to global warming, could make high costs for essentials such as rice, wheat and milk a permanent fixture, they say. "The indications are in general pointing to high prices," Abdolreza Abbassian, a senior grains analyst at the UN Food and …