2018 No https://pubmed.ncbi.nlm.nih.gov/29380200/ Coleman Lerner, Jorge Esteban South America Observational Exposure Study Volatile Organic Compounds (VOCs) Volatile organic compounds (VOCs) LCR Health risk indoor Higher levels of VOCs were found in homes and schools in the industrial zone, higher than the levels corresponding to urban and residential. Taking into account the relationship between indoor and outdoor levels of VOCs, they have ratios (I/O) between 1.5 and 10 are evidenced contributions of emission sources of VOCs both indoor and outdoor. Complementarily, we estimated the life time cancer risk (LCR) for benzene, styrene, trichloroethylene, and tetrachloroethylene in children who spend their time mostly in such indoor environments. The results show high LCR values for benzene, which exceed acceptable values for the US EPA.