1. Solar Energy Research Institute (SERI), National University of Malaysia, Bangi, Selangor 43600, Malaysia
2. Department of Community Health, Faculty of Medicine, National University of Malaysia, Cheras, Kuala Lumpur 56000, Malaysia
3. Environment and Sustainability Institute (ESI), University of Exeter, Penryn Campus, Penryn, Cornwall TR10 9FE, U.K.
4. Department of Mechanical Engineering Technology, Yanbu Industrial College, P.O. Box 30436, Yanbu Alsinaiyah 41912, Saudi Arabia