sentences: the earth 's atmosphere is made of 23133 percent oxygen by mass & the earth 's atmosphere is made of 1288 percent argon by mass & the earth 's atmosphere is made of 036 percent carbon dioxide by volume & the earth 's atmosphere is made of 0 to 4 percent hydrogen / water vapor by volume & the earth 's atmosphere is made of 78 percent nitrogen by mass ->  earth's atmosphere is made of nitrogen, oxygen, water vapor, argon, and carbon dioxide  earth's atmosphere is made of nitrogen, oxygen, water vapor, argon, and carbon dioxide & the earth 's atmosphere is made of 036 percent carbon dioxide by volume & 0036 is the smallest percent among 1288, 4, 23133, 78 percent -> carbon dioxide has the lowest volume in earth's atmosphere