Urban issues - Maps and Graphics at UNEP/GRID-Arendal

Theme: Urban issues

Environmental issues in urban environments are a very special category, and tend to be focused on the physical environment for the population in the cities. Another category of urban issues are the environmental impact of cities on the regional and global environment. Issues related to cities are pollution, slums, water and the provision of other needs. Please also see related themes, such as freshwater and sanitation, poverty and waste.

There are currently 100 graphics under this theme.
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Urban density and transport-related energy consumption Transport-related energy consumption Gigajoules per capita per year, Urban density Inhabitants per hectare
Demography of the Caucausus ecoregion, rural and urban population The Caucasus ecoregion, which includes the countries of Georgia, Azerbaijan and Armenia, and parts of Russia, Turkey and Iran, has three main urban centres - Yerevan, Tbilisi and Baku. Rural [..]
Urban water supply and wastewater on a shallow aquifer This graphic shows the changes in water supply and wastewater disposal that occur through four stages of growth of a settlement: early settlement; the town becomes a city; the city expands and the [..]
Copenhagen, paradise for cyclists In Copenhagen 36 per cent of the city's inhabitants cycle to work, using a network of more than 330 kilometres of cycle tracks and travelling at an average speed of 15 kph.
Political choices About political choices, National / International scale, Local / City scale
Urban, dryland, and polar systems Urban systems are built environments with a high human density. For mapping purposes, the MA uses known human settlements with a population of 5,000 or more, with boundaries delineated by observing [..]
Population density and urban centers in the Caspian Sea region Apart from two large urban areas – Baku-Sumgait and Makhachkala-Kaspiisk – and the Iranian coast on the southern shore, a very densely populated coastal strip where one agglomeration leads into the [..]
Groundwater contamination from canals - Hat Yai, Thailand In areas where surface water is not readily available (located far away from areas where it is needed), groundwater is the primary water source. This graphic shows the chloride concentration and the [..]
Urban water cycle This graphic illustrates the impact of human activity on groundwater. It shows that groundwater is obtained from periurban wellfields and urban wells, then used and disposed of as wastewater through [..]
Urban population: status and trends Since the dawn of civilization, people have been aggregating in towns and cities. This trend has reached an even higher rate with the dawn of industrialisation, and especially in developing countries, [..]
Freshwater use by sector at the beginning of the 2000s The agricultural sector is by far the biggest user of freshwater. Analysis indicates that: - In the United States, agriculture accounts for some 49% of total freshwater use, with 80% of this volume [..]
Major cities in the Andean community The urbanisation of the population has been happening since the first city, and is rapidly increasing in rate - especially since the dawn of industrialization. The Andean community consists out of [..]
Trends in urban and rural populations, less developed regions, 1960-2030 (estimates and projections) According to the latest UN estimates, almost all of the world’s population growth between 2000 and 2030 will be concentrated in urban areas in developing countries (Figure 32). By 2030, almost 60% [..]
Supermarket share of retail food sales Large urban markets create the scope for the establishment of big supermarket chains, with implications for the entire food supply chain. In 2002, the share of supermarkets in the processed/packaged [..]
Urban density and transport-related energy consumption Showing North American cities, Australian cities, European cities and Asian cities.