Question

Which of the following is not a naturally occurring part of Earth's atmosphere?

A. gases such as oxygen
B. gases such as carbon dioxide
C. dust and other tiny solid particles
D. sulfur oxides from factories

Answer 1

D. sulfur oxides from factories

Step-by-step explanation:

This does not naturally occur, only if there is a factory. These other things happen on their own in nature but sulfur from factories relies on other factors down on earth.