“…Different designs of single and double slope single basin passive solar stills with glass cover and black painted basin were constructed and tested experimentally in several countries with different climate conditions such as Saudi Arabia [10], India [11], Egypt [12], Cote D Ivoire (Ivory Coast) [13], and Malaysia [14] and each had a different cumulative productivity of 2.5, 1.88, 3.58, 4.10, and 2.26 kg/m 2 .d, respectively. The performance of those solar stills was investigated for durations of 1 day, 5 days, 3 days, 1 day, 4 days, 1 day, and 5 days in Saudi Arabia [10], Malaysia [4,6], India [11], Egypt [12], Cote D Ivoire (Ivory Coast) [13], and Malaysia [14], respectively. According to the World Health Organization (WHO), a person needs 2-3 L potable water per day for survival [15].…”