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contestada

100 POINTS
Complete the sentence: Combustion heating and cooling appliances are sources of
and often found in basements.
O asbestos
O radon gas
O tobacco smoke
O carbon monoxide

Respuesta :

Answer:

Carbon monixide

Explanation:

Right answer

Answer:

carbon monoxide is the awnser

Explanation:

When I took this quiz that was the right awnser.