1-2 years
it takes sevaral thousandes of yearsor more
nocan not be replaced / takes a long time to form
It takes a long time...
Because it takes a very long time to produce coal. During your lifetime, if it is gone, it can not be replaced.
12 months
It takes about a couple of hours
two weeks
It takes 20000 day to build an oil rig.
There isn't much left and it takes a long time to restore.
it takes 32 years
It takes quite a while to build muscle from walking, but it takes only a short time to build good strong leg muscle from jogging or running.