Table 3: Comparison of natural radioactivity levels in the soil of Likuyu village with those in other countries as given in UNSCEAR (2000) [11].

CountriesActivity concentration (Bq/kg)
238U 232Th 40K

Malaysia 66 (49–86)82 (63–110)310 (170–430)
China 32 (2–440)41 (1–360)440 (38–760)
Egypt 37 (6–120)18 (2–96)320 (29–650)
Algeria30 (2–110)25 (2–140)370 (66–1150)
India 29 (7–81)64 (14–160)400 (38–760)
Portugal 49 (26–82)51 (22–100)840 (220–1230)
Hong Kong SAR84 (25–130)95 (16–200)530 (80–1100)
United States 35 (4–140)35 (4–130)370 (100–700)
World average 30 (16–110)35 (11–64)400 (140–850)
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