What would happen if every human suddenly disappeared? - Dan Kwartler

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Human beings are everywhere.

With settlements on every continent, we can be found in the most isolated corners of Earth's jungles, oceans, and tundras.

Our impact is so profound, most scientists believe humanity has left a permanent mark on Earth's geological record.

So what would happen if suddenly, every human on Earth disappeared?

With no one maintaining them, some of our creations backfire immediately.

Hours after we disappear, oil refineries malfunction, producing month-long blazes at plants like the ones in western India, the southern United States, and South Korea.

In underground rail systems like those in London, Moscow, and New York City, hundreds of drainage pumps are abandoned, flooding the tunnels in just three days.

By the end of the first week, most emergency generators have shut down, and once the fires have gone out, the earth goes dark for the first time in centuries.

After the first catastrophic month, changes come more gradually.

Within 20 years, sidewalks have been torn apart by weeds and tree roots.

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