A clean and adequate water supply and clean air rank as among the current top concerns for some cities around the world, according to survey released singapore on Thursday.

Other pressing issues facing urban development include waste management, jobs, housing, and balancing development and the environment. That is the response from a sampling of city leaders and urban planners who attended Singapore's World Cities Summit 2010, held June 28-July 1.

The group surveyed represents cities from Australia, France, India, Singapore, South Korea, Switzerland, the United States, and Vietnam.

Asked about issues of greatest concern over the next five years, respondents pointed to waste management, jobs, housing, and balancing development and environment as some of the key issues.

In addition, they ranked urban greenery as most important for making a city livable, followed by urban planning, public housing, cultural vibrancy, and water management.

More than 1,000 government, industry, and business delegates from more than 60 countries and regions gathered for the second biennial World Cities Summit 2010.