People move to cities for jobs and increased wages. Currently half of the world’s population lives in cities, and that number is expected to grow to two-thirds by 2050. Cities face unique threats from poverty and destruction of the environment. As cities continue to expand, problems facing the quality and safety of air and water, as well as the availability of water, create threats. Cities have to deal with disposing of waste and the energy required by city residents. It is essential to develop a strong infrastructure to manage the needs of people living in cities.
Source: Urban Threats
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