If suddenly men kind disappeared, how long do you think the earth would come back to normal?

Answer 1

do you mean to ask: If man kind suddenly disappeared, how long would it take for the earth to return to normal?

If that's the case, then I think it would take centuries, if you define 'normal' as being the state the earth would be in if we were never here...because all of our architecture would take years and years to be broken down and our cities overgrown with forests again.

Answer 2

Man has such an ego to think that he can cause the earth to evade normalcy. All man can do is make the planet less livable for himself and some of the plants and animals currently present. The animals, insects, and plants are continually evolving and moving around to keep up with the pressures that man has put on habitats.

The Earth will never be the same after man has gone, but the Earth was never constant to begin with.

and by the way.. normal is just a setting on the clothes dryer...

Answer 3

I think at least one hundred or it could up to one million years to make this earth back to normal. As human kinds are vanished, this earth is dead. In another assumption that human kind is suddenly disappear. The environment is peaceful and remain undisturb to wild animals and the water is clean. It becomes a rich resources earth where apes will turn into human again, perhaps. The earth will instantly undergoing the normal changes of no human kinds disturb.

Answer 4

It really depends. A lot of subruban houses would have fallen away and be almost gone in 400 years (that includes the pipes, wires & plastics used in houses).

There are other things that quiet simply would never disapear without a major event happening, like a volacno, or astroid hitting the earth. Open pit mines are one of those things that simply will not disappear. Sure they will get growth, and wildlife will begin to use them, but they will not fill back in. Even after millions of years.

More than 10 million years later, you would still be able to recognize bronze sculptures.

Some of the toxic things we have done to the earth would be around for millions, even billions of years. (Our depleted Uranium will only be reaching it's 1/2 life around the time the our sun starts go die)

There are other things, like our radio, and TV waves which will go on forever.

I think you would find this link to be of interest:
http://www.worldwithoutus.com/index2.html

Click on the link and go to the bottom of the page. Click on the part that says, "Your house without you."

It's really very interesting.

~Garnet
Homesteading/Farming over 20 years

Answer 5

I can't locate the exact article I've read before, but below is another good one. This is a serious question that scientists have explored before. We have a serious impact, but how quickly would the Earth 'recover' from our presence? I'll keep looking for this - I once read an article that had a diagram briefly describing how long it would take for the leavings of human societies to break down and be consumed - it was very cool and eye-opening.
Edit: I found it! Second link below, very cool timeline.

Answer 6

2 years.

Answer 7

I honestly have to say: It DEPENDS on the circumstances of the dissapearances. In the event of nuclear warfare, it would take almost another 4,000,000 years or "something" like that. Then there's always those who think ahead and build underground cities in the event something like that would go wrong. Interesting question!

Answer 8

It depends on your definition of normal. If you are talking about Global warming then global warming is a natural event with a very minimal effect by man.

If you are talking about man made structures then it would be thousands of years before they all disappeared.

Answer 9

So I guess your saying that any advanced civilization with tool making capabilities would not be normal in any part of the universe. So that if that if this type of life exists in other solar systems in far parts of the expanse as many scientists contemplate. They would have to disappear before the universe would be normal.

Answer 10

I think 400 years. that's four centuries away.