7 Alarming Things That Would Happen If the World Lost Oxygen for 5 Seconds

1. Buildings and Landmarks Would Crumble


Many of the most iconic structures around the world would collapse in an instant. Concrete depends on oxygen to keep its strength. Without it, the chemical bonds in concrete would fall apart. Famous landmarks like the Hoover Dam, giant stadiums, and ancient temples would instantly turn into piles of dust.

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