Non-renewable resources

I would like to talk about "We are using non-renewable resources such as fossil fuels as if they were present in unlimited supplies. In Saudi Arabia, there are many people use cars for transportation. Also, most families buy for their children a car when they reached 18 years old if they have the ability to pay for them. Even if Saudi Arabia is the largest exporter of petroleum in the world, people should economizes the petroleum. They use it like an unlimited resource, but in fact it isn't unlimited. After many years, someday the petroleum will finish. I hope they economizes the petroleum because if they do, our economy will be stable for many years.