This free course was written by Alison Fox and Clare Lee.
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Figure 1: 'People. Lots of them...' (Anhangabau Subway Station, Line 3 - Red, Sao Paulo, Brazil) © Diego Torres Silvestre. This file is licensed under the Creative Commons Attribution Licence http://creativecommons.org/licenses/by/2.0/
Figure 2: Taiwan population pyramids © Chen-Pan Liao via Wikimedia. https://commons.wikimedia.org/wiki/File:Taiwan-population-pyramid-1980.svg / https://en.wikipedia.org/wiki/File:Taiwan-population-pyramid-2014.svg This file is licenced under the Creative Commons CC0 1.0 Universal (CC0 1.0) Public Domain Dedication licence https://creativecommons.org/publicdomain/zero/1.0/deed.en
Figure 3: 'Crowd' © James Cridland via Flickr. Crowd by James Cridland CC BY 2.0. This file is licenced under the Creative Commons Attribution 2.0 Generic licence https://creativecommons.org/licenses/by/2.0/
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