30 Seconds of Suffocation on the Line of Life and Death (Fiction)

When the earth lacks oxygen. How many seconds can you last?

2060 AD,

Dark Grey Alien.

Through a straw. Deep into the atmosphere.

Slowly absorb oxygen from the earth.

at this time,

Carbon dioxide rises above the critical point,

Oxygen inhaled by Earthlings.

The dark ages when there is less oxygen than exhaled,

And the way to survive is.

live on the sea.

Wearing "intelligent nose-plug artificial fish gills",

Converts oxygen through seawater.

but.

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