Question

why do gases like oxygen and carbon dioxide don't get over even when so many living beings consume it every day?

Answer 1

it is circulating from plants to human then humans to plants...

Answer 2

as they are present in sufficient quantity on earth and they are produced every day during photosynthesis process done by plants and during aerobic and anaerobic respiration done by all living being...this is the reason why they dont get over........I hope it will help you