1. Zhou, A., & Li, J. (2020). The nonlinear impact of industrial restructuring on economic growth and carbon dioxide emissions: A panel threshold regression approach. Environmental Science and Pollution Research, 27(12), 14108–14123.
2. Mirkin, B. (2010). Population levels, trends and policies in the Arab region: challenges and opportunities. Regional Bureau for Arab States USA: United Nations Development Programme.
3. Shuja, J., Ahmad, R. W., Gani, A., Ahmed, A. I. A., Siddiqa, A., Nisar, K., et al. (2017). Greening emerging it technologies: Techniques and practices. Journal of Internet Services and Applications, 8(1), 1–11.
4. Glanz, J., & Sakuma, P. (2011). Google details, and defends, its use of electricity. The New York Times, Vol. 8.
5. Clark, D. (2011). Google discloses carbon footprint for the first time. The Guardian, Vol. 8.