Involuntary second-hander

Neon signs are illuminated in Mong Kok district in Hong Kong, October 4, 2011. Mong Kok has the highest population density in the world, with 130,000 in one square kilometre. The world’s population will reach seven billion on 31 October 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. Picture taken with a long exposure and lens zoom effect. Picture taken October 4, 2011. REUTERS/Bobby Yip