Open Discussion #1: Would we still have oxygen if there weren’t any trees?

Hey guys! This is my very first open discussion. Today my sister asked the question: Would we still have oxygen there weren't any trees (just all plants in general) and it stumped me for a second. I have two theories: All oxygen would dwindle eventually because nothing is turning our oxygen into carbon dioxide. Our … Continue reading Open Discussion #1: Would we still have oxygen if there weren’t any trees?