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 A city's footprint is the amount of land required to provide its raw materials and deal with its wastes. London's footprint is 19,700,000 ha (125 times its surface area). This is only marginally less than the size of UK as a whole (area: 24,400,000 ha). Makes you think, doesn't it?
- OneWorld
Bangkok is sinking at the rate of one centimetre a year due to excessive private tapping of ground water. This ground water tapping is not only lowering the water table, but also contributing to sea-water seepage.
- Source unknown
By 2025, 'fully 88 percent of the world's total population growth will be located in rapidly expanding urban areas and 90 percent of that urban growth will be absorbed by the developing world.'
- World Bank, Livable Cities for the 21st Century
Taking into account land for living, food production, energy production, waste containment etc. Mathas Wackernagel and William Rees estimate that in Canada it takes 4.3 ha/person, in the US it is 5.1, India 0.4, and the world 1.8. The authors also estimate the fair share of the Earth's ecologically productive land per capita to be a circle with a diameter of 138 meters.
The Urban Thinking Cap. Short insightful write-ups highlighting the problems and solutions in the UEM processes
Write-ups and numbers that make you think - the objective of this section is to develop a sensitivity to the interrelationships and interdisciplinarity of urban environments. This is done by highlighting the problems and solutions, causes and effects, in UEM processes.Best practices and lessons learnt are also included ...

Contributions are invited for this section, either as new documents, or as additions and substantiations to existing documents. Additions are particularly invited to the Quick Tips section. Please use the email listed below for further communication.
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Contact: Hari Srinivas - hsrinivas@gdrc.org