Data used for graphics from the UN World Urbanisation Prospects Report, 2014 revision.  Accessed at http://esa.un.org/unpd/wup/Publications/Files/WUP2014-Highlights.pdf

Data used for graphics from the UN World Urbanisation Prospects Report, 2014 revision, accessed at http://esa.un.org/unpd/wup/Publications/Files/WUP2014-Highlights.pdf

Main graphic adapted from data in City Limits: A resource flow and ecological footprint analysis of Greater London (2002), commissioned by IWM (EB) Chartered Institute of Wastes Management Environmental Body.  Accessed at http://www.citylimitslondon.com/downloads/Complete%20report.pdf 

“Urban Density” graphic uses data from Tim de Chant’s Per Square Mile, 2012. Accessed at http://persquaremile.com/2012/08/08/if-the-worlds-population-lived-like/