question: What does smog contain?
choices.text: mosses, liverworts, hornworts gas layer surrounding Earth physical properties carbon based species carbon based beings mosses, lichens, and hornworts very small or liquid particles hydrogen and oxygen
choices.label: A B C D E F G H
formatted_question: What does smog contain? (A) mosses, liverworts, hornworts (B) gas layer surrounding Earth (C) physical properties (D) carbon based species (E) carbon based beings (F) mosses, lichens, and hornworts (G) very small or liquid particles (H) hydrogen and oxygen