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

09-03-2017

The answer is #4. Radon.

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