not at all - and exponential growth is a more nuanced term than you may realize.  UN population growth projection for the next 100 years shows (95% conf) at most a doubling of population.   development of nations has roared ahead since the industrial revolution, and petroleum reserve development has easily kept pace.  I really am saying that time spent worrying about running out of oil -- ESPECIALLY running out for the purposes of plastics production is a complete waste of your time and a distraction from actually important things.    Come to think of it, worrying about over-population is also a curious preoccupation of rich, privileged, people like ourselves.<p>Malthus was wrong.<p>That there is a commons does not mean there is a tragedy.