International Herald Tribune: A UN summit meeting on the global food crisis asked rich nations on Wednesday to help “revolutionize” farming in Africa and the developing world to produce more food for nearly one billion people facing hunger. “The global food crisis is a wake-up call for Africa to launch itself into a ‘green revolution’ which has been over-delayed,” Sayyadi Abba Ruma, the Nigerian agriculture minister, said on the second day of the three-day meeting. “Every second, a …