January 18,2011 Tangra,Kolkata,India,Asia-Kolkata has a population of over 13 million people. Almost one third of this population lives in the slum areas. Families have little or no money to spend on anything but surviving. An average monthly income for a family is between $10 to $65 with around 75% of this spent on food. House hold size of five to six persons, some three quarters of the kolkata slum population one below the poverty line.