A glimpse of a post-apocalyptic world. Bulgar/E+ via Getty Images
Have you ever wondered what the world would be like if everyone suddenly disappeared?
What would happen to all our stuff? What would happen to our houses, our schools, our neighborhoods, our cities? Who would feed the dog? Who would cut the grass? Although it’s a common theme in movies, TV shows and books, the end of humanity is still a strange thing to think about.
But as an associate professor of urban design – that is, someone who helps towns and cities plan what their communities will look like – it’s sometimes my job to think about prospects like this.
So much silence
If humans just disappeared from the world, and you could come back to Earth to see what had happened one year later, the first thing you’d notice wouldn’t be with your eyes.
It would be with your ears.
The world would be quiet. And you would realize how much noise people make. Our buildings are noisy. Our cars are noisy. Our sky is noisy. All of that noise would stop.
You’d notice the weather. After a year without people, the sky would be bluer, the air clearer. The wind and the rain would scrub clean the surface of the Earth; all the smog and dust that humans make would be gone.
It wouldn’t be long before wild animals visited our once well-trodden cities. Boris SV/Moment via Getty Images
Home sweet home
Imagine that first year, when your house would sit unbothered by anyone.
Go inside your house – and hope you’re not thirsty, because no water would be in your faucets. Water systems require constant pumping. If no one’s at the public water supply to manage the machines that pump water, then there’s no water.
But the water that was in the pipes when everyone disappeared would still be there when the first winter came – so on the first cold snap, the frigid air would freeze the water in the pipes and burst them.
There would be no electricity. Power plants would stop working because no one would monitor them and maintain a supply of fuel. So your house would be dark, with no lights, TV, phones or computers.
Your house would be dusty. Actually, there’s dust in the air all the time, but we don’t notice it because our air conditioning systems and heaters blow air around. And as you move through the rooms in your house, you keep dust on the move too. But once all that stops, the air inside your house would be still and the dust would settle all over.
The grass in your yard would grow – and grow and grow until it got so long and floppy it would stop growing. New weeds would appear, and they would be everywhere.
Lots of plants that you’ve never seen before would take root in your yard. Every time a tree drops a seed, a little sapling might grow. No one would be there to pull it out or cut it down.
You’d notice a lot more bugs buzzing around. Remember, people tend to do everything they can to get rid of bugs. They spray the air and the ground with bug spray. They remove bug habitat. They put screens on the windows. And if that doesn’t work, they swat them.
Without people doing all these things, the bugs would come back. They would have free rein of the world again.
Given enough time, roads would start to crumble. Armastas/iStock via Getty Images Plus
On the street where you live
In your neighborhood, critters would wander around, looking and wondering.
First the little ones: mice, groundhogs, raccoons, skunks, foxes and beavers. That last one might surprise you, but North America was once rich with beavers.
Bigger animals would come later – deer, coyotes and the occasional bear. Not in the first year, maybe, but eventually.
With no electric lights, the rhythm of the natural world would return. The only light would be from the Sun, the Moon and the stars. The night critters would feel good they got their dark sky back.
Fires would happen frequently. Lightning might strike a tree or a field and set brush on fire, or hit the houses and buildings. Without people to put them out, those fires would keeping going until they burned themselves out.
Around your city
After just one year, the concrete stuff – roads, highways, bridges and buildings – would look about the same.
Come back, say, a decade later, and cracks in them would have appeared, with little plants wiggling up through them. This happens because the Earth is constantly moving. With this motion comes pressure, and with this pressure come cracks. Eventually, the roads would crack so much they would look like broken glass, and even trees would grow through them.
Bridges with metal legs would slowly rust. The beams and bolts that hold the bridges up would rust too. But the big concrete bridges, and the interstate highways, also concrete, would last for centuries.
The dams and levees that people have built on the rivers and streams of the world would erode. Farms would fall back to nature. The plants we eat would begin to disappear. Not much corn or potatoes or tomatoes anymore.
Farm animals would be easy prey for bears, coyotes, wolves and panthers. And pets? The cats would go feral – that is, they would become wild, though many would be preyed upon by larger animals. Most dogs wouldn’t survive, either.
An asteroid hit and a solar flare are two of the ways the world could end.
Like ancient Rome
In a thousand years, the world you remember would still be vaguely recognizable. Some things would remain; it would depend on the materials they were made of, the climate they’re in, and just plain luck. An apartment building here, a movie theater there, or a crumbling shopping mall would stand as monuments to a lost civilization. The Roman Empire collapsed more than 1,500 years ago, yet you can see some remnants even today.
If nothing else, humans’ suddenly vanishing from the world would reveal something about the way we treated the Earth. It would also show us that the world we have today can’t survive without us and that we can’t survive if we don’t care for it. To keep it working, civilization – like anything else – requires constant upkeep.
About The Author
Carlton Basmajian, Associate Professor of Community and Regional Planning, Urban Design, Iowa State University
This article is republished from The Conversation under a Creative Commons license. Read the original article.
Books on The Environment from Amazon's Best Sellers list
"Silent Spring"
by Rachel Carson
This classic book is a landmark in the history of environmentalism, drawing attention to the harmful effects of pesticides and their impact on the natural world. Carson's work helped to inspire the modern environmental movement and remains relevant today, as we continue to grapple with the challenges of environmental health.
Click for more info or to order
"The Uninhabitable Earth: Life After Warming"
by David Wallace-Wells
In this book, David Wallace-Wells offers a stark warning about the devastating effects of climate change and the urgent need to address this global crisis. The book draws on scientific research and real-world examples to provide a sobering look at the future we face if we fail to take action.
Click for more info or to order
"The Hidden Life of Trees: What They Feel, How They Communicate?Discoveries from A Secret World"
by Peter Wohlleben
In this book, Peter Wohlleben explores the fascinating world of trees and their role in the ecosystem. The book draws on scientific research and Wohlleben's own experiences as a forester to offer insights into the complex ways that trees interact with one another and the natural world.
Click for more info or to order
"Our House Is on Fire: Scenes of a Family and a Planet in Crisis"
by Greta Thunberg, Svante Thunberg, and Malena Ernman
In this book, climate activist Greta Thunberg and her family offer a personal account of their journey to raise awareness about the urgent need to address climate change. The book provides a powerful and moving account of the challenges we face and the need for action.
Click for more info or to order
"The Sixth Extinction: An Unnatural History"
by Elizabeth Kolbert
In this book, Elizabeth Kolbert explores the ongoing mass extinction of species caused by human activity, drawing on scientific research and real-world examples to provide a sobering look at the impact of human activity on the natural world. The book offers a compelling call to action to protect the diversity of life on Earth.
