megan309
megan309 megan309
  • 09-03-2017
  • Physics
contestada

________ is a colorless and odorless radioactive gas that is forms naturally by certain underground rocks 1. Sewage 2. Sediment 3. Leachate 4. Radon

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PsychedelicPancakes
PsychedelicPancakes PsychedelicPancakes
  • 09-03-2017
The answer is #4. Radon.
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