JOURNAL OF ENGINEERING AND APPLIED SCIENCE, VOL. 66, NO. 4, AUG. 2019, PP. 403-427 FACULTY OF ENGINEERING, CAIRO UNIVERSITY ASSESSING THE EFFECT OF ELECTROMAGNETIC RADIATIONS ON HUMAN BEINGS IN THE BUILT ENVIRONMENT N. S. ELRAFIE 1 , G. F. HASSAN 2 , A. S. ABD ELRAHMAN 3 AND M. A. ELFAYOUMI 4 ABSTRACT Our earth is a living body that has energy veins flowing all over, just like the human body where blood flows from and to the heart. These natural earth energies are as old as the earth existence and interact with everything on its surface. They were believed to have either a healing effect in “Power Spots” or a stressful ef fect in “Geopathic Stress Zones” that can change the normal functioning of human beings and damage their health. Thousands of years ago, these energies’ effects were considered during designing the built environment. This no longer takes place although recent research discovered that the urban ambiance is badly affected by electromagnetic radiation from different sources. Moreover, one of the main objectives of urban design is bringing to the user a sense of wellbeing and emotional satisfaction. The paper argues that respecting the natural earth energies during the design process will affect the wellbeing of the users. Consequently, the paper undergoes an exploratory process through a survey in Al-Sultan Hassan mosque using observations and a structured questionnaire to investigate this relationship. The survey confirmed that following the earth energy grids in the design affects the visitors positively and enhances their abilities and wellbeing. KEYWORDS: Electronic Radiation, Geographic Stress, Wellbeing, Built Environment 1. SCOPE OF WORK The focus of the study is to illustrate the different natural sources of electromagnetic radiation and to assess the effect caused as a result of following these sources in the design process of the built environment on human behaviour and wellbeing, and not to measure the surrounding energies themselves although they can be measured using special devices that will be mentioned later in the paper. 1 Teaching Assistant, Faculty of Engineering, Ain Shams University, nesma_elrafie.07@outlook.com 2 Professor, Faculty of Engineering, Ain Shams University, ghadafhassan@eng.asu.edu.eg 3 Associate Professor, Faculty of Engineering, Ain Shams University, ahmed.sami@eng.asu.edu.eg 4 Associate Professor, Faculty of Engineering, Ain Shams University, m_fayoumi@eng.asu.edu.eg