The United Nations has released population data confirming the continuation of long-term global demographic trends and a larger global population than previously projected. Most of the planet’s people will live in cities. Virtually all expected population growth will be concentrated in the urban areas of poor countries increasing the threat of pollution and epidemic. By 2050, the number of people living in cities will almost be equal to today's world population. Faced with the opportunities and challenges associated with urbanization, many governments have traditionally sought to stem migration to large cities with a host of policies that have proven largely ineffective. Needed, instead, are policies and adaptation strategies to accommodate future urban growth. These must include developing appropriate infrastructure and providing access to basic education and training, health, gainful employment, especially among young people, so that countries can reap the benefits of economies of scale and greater efficiency as well as minimize environmental and other adverse impacts of urban growth.