How long until oil depletion

Lately the world faces shortage of oil and causes the increase of oil price. I'm sure this hits everybody and every country. Due to this incident, people are starting to ask how long until oil depletion? Sooner or later the world going to use up all the remaining of the oil. What will the world becomes when that happened. Due to this issue many country started to search for alternative energy source or some other resources that can replace oil. There are some good suggestion and ideas but all are still at the early stage of development. The question is can it be ready in time to replace the oil? We need time to develop these alternative energy source. How much time is needed and do we have the time? Well, no time to worry about that. We just have to finish the development as soon as possible. If you want to know more about oil depletion, check out this site - The Wolf At The door.