Which gas is a source of natural groundwater pollution?
A. Oxygen
B. Radon
C. Hydrogen
D. Carbon
i think its a
5 answers
Oxygen is a polluter? I don't think so!
Which gas is a source of natural groundwater pollution?
A. Hydrogen
B. Oxygen
C. Carbon
D. Radon
A. Hydrogen
B. Oxygen
C. Carbon
D. Radon
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
A. Deflation
B. Creep
C. Mudflow
D. Landslide
the answer is D. Carbon
well its not D. for sure cuz I took the Penn Foster test and it was wrong.
6 answers