Answer:
The answer is Por la<u> contaminacion</u>
Explanation:
because por la cascada de los coches does not make sense
because por la nube de los coches not really
because por la tierra de los coches noo
I can give you a couple.
Similarities
Both have over 1.5B people following each religion around the world.
Both are monotheistic.
Differences
Christian is mainly from North America and Europe, Islam is mainly Northern Africa and the Middle East.
Christian holy places: Jerusalem, Bethlehem, Islam holy places: Mecca, Medina
Hope that helped,
-sirswagger21