The number of hungry people in the world has fallen by only 17 percent since 1990, far less than what was once hoped. Also, the face of hunger is changing. Hunger used to be a localized crisis caused by crop failures, but in today's globalized marketplace crop failures in one region can increase prices around the world. For urban populations who cannot grow their own food, price spikes can result in hunger and malnutrition. Urbanization has pushed many of the world's poor out of subsistence farming and into towns and cities.