Question

If all plants vanish from the earth's surface which gas will also disappear

Answer 1

If all the green plants will disappear from earth then it will cause a decrease in the concentration of the oxygen to such a low level that it would not be sufficient for all the living organisms for breathing. Thus, it will result in their death.

Answer 2

Answer: oxygen gas will disappear

Explanation: plants give out oxygen as a by product of photosynthesis