Mostly this is actually part of an article done in The Economist in 2007. So be aware, if you use it in the exam, you should probably say what year the data is from. I added in the mention about Slum Dog Millionaire, as that hadn't come out in 2007 but WAS filmed there, and I added the bit about slum improvements and the urbanisation types at the end. The bit about slum improvements was sourced from the University of Derby.