thalliume says: here you go, an ELF style living on Earth at this time... One MAJOR item they overlooked. It's called RADON gas and is an odorless, colorless, noble gas that can kill you. Buildings or dwellings that have habitable space below ground level are found to those with the gretaest radon gas levels. Radon is a significant contaminant that affects indoor air quality worldwide. Radon gas from natural sources can accumulate in buildings and reportedly causes 21,000 lung cancer deaths per year in the United States alone. |
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