The density of cities favors this job-hopping behavior more than the relative isolation of suburbia.
Failing infrastructure, the increasing density of cities and the growing frequency of extreme weather events create public health risks on a massive scale.
Simultaneously, the added density of cities encourages health problems: hastily erected housing, stressed waste disposal systems and air pollution due to increasing use of automobiles (2).
The researchers, who sampled New Yorkers in 2004, a year after the city's ban on smoking in most indoor working and public spaces took effect, said the density of city living might be to blame.
The population density of City A is far greater than the population density of City B. Compare the data you found to other reports on population density.
The population density of City A is far greater than the population density of City B. For example, if the neighboring City B has 60,000 in 8 square miles, then its population density is 7,500/square mile.
Across the world, it would be a mistake to focus solely on improving the average densities of cities. Los Angeles has a higher average density than New York, for example, yet LA is regarded as a dysfunctional urban form while NY is functional, because it comprises a network of high-density neighbourhoods interconnected by efficient and affordable mass transit systems.
Over the last 20 years, more and more people are living in cities, so the density of the city centres has been increasing rapidly.
This includes building on ex-industrial land, in many small increments as well as through large plans, and increasing the density of existing cities and suburbs.
But one striking difference is the higher density of garden cities in China, reflecting its urban culture; Tianfu will have a population of 2 million (Letchworth's is just 33,000).
Contradictory claims are currently made for the desirable density of sustainable cities.
