"What If", a YouTube channel has made a video imagining what would happen if there was a lack of oxygen for just 5 seconds.
In humans, we wouldn't die from not breathing, since we can stay longer without air, but we would still die because...
Houses, buildings and anything else made of concrete would completely collapse.
This is because oxygen is part of the binding agent that makes up concrete.
The raw metal would melt.
The sun would scorch us, because a layer of natural gas that protects us from the sun's ultraviolet rays is composed of oxygen.
Cars wouldn't run. The planes would fall.
It would be tragic, but thankfully it's just a hypothetical: What if?