If anyone is interested in a good video explaining "Peak Oil" [0], "Shale Oil" (aka Fracking) [1] as it relates to what this article is talking about, I recommend checking out the links below. I don't endorse everything Peak Prosperity posts but their "Crash Course" is really well done in my opinion (both those videos are on the Crash Course playlist).

[0] https://www.youtube.com/watch?v=0uKihKkx0eY&list=PLRgTUN1zz_...

[1] https://www.youtube.com/watch?v=xliyZMPJvjk&list=PLRgTUN1zz_...