What Would Happen to the World if Humans Suddenly Disappeared?

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Questions and Answers

Within a few hours of human disappearance, ______ around the world would shut off due to lack of maintenance at power stations.

lights

In 2-3 days, ______ systems in cities like New York would flood.

subway

After a month, emergency generators that cool ______ reactors would fail.

nuclear

In about a year, thousands of ______ orbiting the planet would crash down and burn up in the atmosphere.

<p>satellites</p> Signup and view all the answers

In 2 years, ______ and cockroaches would die off in cities with cold climates.

<p>rats</p> Signup and view all the answers

Within a couple hundred years, ______ and towers would corrode and collapse.

<p>bridges</p> Signup and view all the answers

After about 300 years, large ______ and sea animals like whales would thrive without human interference.

<p>land</p> Signup and view all the answers

In 500 years, ______ would reclaim suburban neighborhoods.

<p>forests</p> Signup and view all the answers

10,000 years later, the only evidence of human existence left on earth would be giant ______ structures made of stone.

<p>eroded</p> Signup and view all the answers

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Study Notes

• Within a few hours of human disappearance, lights around the world would shut off due to lack of maintenance at power stations. • Hydroelectric, solar, and wind power would last longer, but eventually malfunction and break down. • In 2-3 days, subway systems in cities like New York would flood and sewers would clog. • After a month, emergency generators that cool nuclear reactors would fail, leading to massive nuclear meltdowns worldwide. • In about a year, thousands of satellites orbiting the planet would crash down and burn up in the atmosphere. • In 2 years, rats and cockroaches would die off in cities with cold climates due to lack of human-provided warmth and food. • In 20-30 years, desert cities like Las Vegas would be reclaimed by nature. • Within a couple hundred years, bridges, towers, and tall buildings would corrode and collapse. • After about 300 years, large land and sea animals like whales would thrive without human interference, and their population numbers would increase. • In 500 years, forests would reclaim suburban neighborhoods. • After a thousand years, large cities would be entirely overgrown with vegetation. • 10,000 years later, the only evidence of human existence left on earth would be giant eroded structures made of stone, such as the pyramids, the Great Wall of China, and Mount Rushmore. • The Voyager 1 spacecraft, carrying a golden record with messages and greetings from earth, would last for the next billion years and travel farther into space.

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