Olive trees are found largely along the coast of Mediterranean climates where the have the ideal precipitation and temperature conditions to thrive. In the mountainous areas further inland, the trees would have to adapt to more extreme temperatures and generally dryer conditions.
The Arabian peninsula does not feature a Mediterranean climate, but instead a desert climate that does not permit the growth of trees outside oases.
In the interior of the Arabian peninsula Cedar and Olive Trees are found in Mediterranean Climates, In this region, you would most likely find these trees
Today the world's population is 7.5 billion. The world's population is changing because of the natural increase rate. The natural increase rate is the crude birth rate minus the crude death rate. Since the crude birth rate is higher than the crude death rate today, this would lead to a higher natural increase rate.