pmerrell160 pmerrell160

28-09-2016
Geography

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Which colorless and odorless gas, produced by radioactive decay of Uranium-238, is considered to be a form of pollution?

A. Hydrogen
B. Radon
C. Oxygen
D. Boron

Respuesta :

Аноним Аноним

28-09-2016

The answer would be B. Radon :)

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