1. Stern N. A Blueprint for a Safer Planet: How to Manage Climate Change and Create a New Era of Progress and Prosperity. London: Bodley Head; 2009
2. Heinberg R, Lerch D, editors. The Post Carbon Reader: Managing the 21st Century's Sustainability Crises. Healdsburg, CA: Watershed Media; 2010
3. Herring H, editor. Living in a Low-Carbon Society in 2050. Basingstoke: Palgrave Macmillan; 2012
4. General Organization for Physical Planning (GOPP). 2013. National Development Plan for Egypt 2050
5. World Health Organization (WHO). Global Ambient Air Quality. 2018. http://www.who.int/airpollution/data/cities/en/ [Accessed: 2018]