7KiB, 259x194, images.jpg View SameGoogleiqdbSauceNAO Anonymous Thu 31 Mar 21:04:25 2022 No.14352885 ViewReplyOriginalReport Quoted By: >>14352931 >>14353014 The Oxygen of Earth is 21%. What would happen if it dropped to 19.5% and could that happen somehow? I woke up thinking this and was worried. Thanks.