Question

Which gas is a source of natural groundwater pollution?

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

i think its a

Answer 1

Oxygen is a polluter? I don't think so!

Answer 2

Which gas is a source of natural groundwater pollution?

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

Answer 3

Which of the following is not a type of mass movement that results from the force of gravity?

A. Deflation
B. Creep
C. Mudflow
D. Landslide

Answer 4

the answer is D. Carbon

Answer 5

well its not D. for sure cuz I took the Penn Foster test and it was wrong.

Answer 6

[AI-generated answer — Explain Bot]

The correct answer is B. Radon. Radon is a radioactive gas that is naturally produced from the decay of uranium present in soil and rocks. It can dissolve into underground water sources, causing groundwater pollution. Radon is the second leading cause of lung cancer globally, and prolonged exposure to radon-contaminated groundwater can pose health risks.