Midwives hold a newborn baby girl named Danica Camacho, the Philippines' symbolic "seven billionth baby", as part of the U.N.'s seven billion global population projection, in Fabella Maternity hospital in Manila October 31, 2011. The world's population will reach seven billion on October 31, 2011, according to projections by the United Nations, which says this global milestone presents both an opportunity and a challenge for the planet. While more people are living longer and healthier lives, says the U.N., gaps between rich and poor are widening and more people than ever are vulnerable to food insecurity and water shortages. REUTERS/Erik De Castro (PHILIPPINES - Tags: SOCIETY POVERTY HEALTH)