Peak oil and the low-carbon energy transition: A net-energy perspective ( www.sciencedirect.com )

Since the Pennsylvania oil rush of 1859, petroleum has quickly become the dominant fuel of industrial society. The “Peak Oil” debate focused on whether or not there was an impending production crunch of cheap oil, and whilst there have been no shortages across the globe, a shift from conventional to unconventional oil liquids has occurred.

(This is an A/B comparison test from lemmy https://infosec.pub/post/55047)