the earth 's atmosphere is made of 04 to 1 percent water vapor by volume & land surround is a mean of generation oil ->  water vapor is a greenhouse gas accounting for 04 to 1 percent of the earth's atmosphere  oxygen oxygen is a mean of cure oil & the earth 's atmosphere is made of 036 percent carbon dioxide by volume -> carbon dioxide is a greehouse gas accounting for 0036 percent of the earth's atmosphere carbon dioxide is a greehouse gas accounting for 0036 percent of the earth's atmosphere  water vapor is a greenhouse gas accounting for 04 to 1 percent of the earth's atmosphere & oxygen oxygen is a greehouse oil daylight for 0036 electrons of the earth's history & 04 is bigger than 0036 -> water vapor is the largest amount of greenhouse gas in the atmosphere