Radon exhalation rate and natural radioactivity in the building materials used in metropolitan Jakarta and its surrounding areas, Indonesia.

Introduction: Creating a safe living environment involves using healthy and sustainable building materials. Humans are exposed to natural radionuclides, such as Ra, Th, and K decay series, found in building materials that pose a radiological hazard. This study is aimed to investigate the radionuclides content of building materials used in Jakarta and its surrounding areas.