Oil. Old plants and animals or something always being created?
The world has been using crude oil for thousands of years in one way or another. At one time people just collected oil that made it to the surface on it's own, then we started drilling for it. The average production today of the world is somewhere in the neighborhood of 92 million barrels - every day. So, my question is: Is oil a finite resource? Just the remains of truely ancient life that has been squashed and heated by the earth and over millions of years turned into crude? Or is oil somehow being constantly produced by some other means?