Urban residents benefit from a concentration of health infrastructure and proximity of services.
The concentration of medical infrastructures in the northern part of the country leads to the referral of patients with serious illnesses, such as endocarditis, to northern hospitals, especially within Algiers.
Although it may be intuitively rational, this definition illustrates some of the challenges to characterizing urban malaria risk, because it does not consider the area of land (hence human population density), the extent of infrastructure concentration, or the type and extent of crop production.
These higher concentrations reduce the amount of infrastructure needed to grow the algae, and also make it much easier to collect the algae and extract the oil, Jarvis says, significantly reducing costs.
Cities are particularly vulnerable to natural disasters due to the concentration of population, buildings and infrastructure.
This indicates that areas with high concentration of urban fabric and infrastructure are better protected than less important urban zones, let alone rural areas.
If you consider that Mexico City combines the biggest concentration of cars, inadequate road infrastructure, and a total lack of road safety culture, it is not surprising that there are more deaths on the city's streets than on any others in Mexico.
Rooted in a history that dates back 1500 years, the concentration of economic activity and infrastructure in Colombo represents an extreme case of urban primacy within the national context of Sri Lanka.
But these cost savings came at the expense of engineering reliability, and led to flooding in the portion of the city with the highest concentration of people, property and infrastructure.
