A subject that fascinates me as well Des.

Provable reserves of oil seem to give us another 50 years of supply.

Although there is more oil still to be discovered there will become a point where it’s no longer financially viable to extract.

When you consider 7/10 of the World is covered by water and that much of the oil sits underneath it it just adds to the challenge.

The other thing that always fascinated me is the amount of living matter that has had to have been for these reserves to have been created and the length of time for this to happen.

Same with beaches, just the sheer volume of material that has had to be worn down to create all the sand on this planet.