Carbon dioxide makes up only a ppm (parts per million) of the atmosphere, by volume.

🎲 Try a Random Question  |  Total Questions in Quiz: 316  |  🧠 Study this quiz with Flashcards
This question is part of a full practice quiz:
Introduction to Geography — practice the complete quiz, review flashcards, or try a random question.


Carbon dioxide makes up only a ppm (parts per million) of the atmosphere, by volume.