The only answer is; no one knows.
The earth may last until the sun dies, which will not be for about 5 billion years. Or it may get hit by a giant asteroid next year. No one can say for definate. Anyone claiming to be able to foresee this is trying to con or scam you in some way.
Many Scientists believe there are only 64 years of the iron ore left! :L
There is enough copper in the world to last us 10-12 more years but after that the world will have run out of copper!!
Well, at the rate the United States uses Oil, We have around 100 years of oil left.
Fossil fuels regenerate very slowly. When we talk about renewables we are discussing items that renew very fast. While we have several hundreds of years of oil left, (most in the United States) we can not regenerate this oil for many many years.
Well, there are many different theories. one is they left because of all of the floods that's happen there, another one is because they ran out of resources, and another is because there was a big flood coming and they went to a place where there aren't as many floods and more resources. In my opinion, i still think there are cahokians left somewhere in the world. For all we know,you could be a cahokian or they could be in the other side of the world. If you think you know why they left or where their tribes might be, please tell me through "Yahoo Answers."
a thousand
There was 700 polar bears left in our world 50 years ago.
5,000 pikas left in the world
It is not true, and if you think that do you really want the world to end? It is going to hurt you more than it hurts the world
There are 110 left in the world
He has two years left.
there is 6,287 left in the world
About 79,000 are left in the world
about 50 years!!!!!!
As long as we discover new sicknesses there will be medicines.
There are round about 160 left in our world
2 million terrorist are left in this world