Ever ask yourself the question of Why do we have stuff today that people didn't have in 1800? Its an obvious answer. We know more now than people knew then. We know how to make cell phones, computers, airplanes, and so forth.
Isn't it striking that people back then had the same resources available, but they didn't use them in a way to make those modern conveniences. That is the point: We are not running out of any resource only because we have learned how to use it.
The whole Leftist Panick that We Are Gonna Die because we know how to do stuff is arrogant anti-thought, and exactly stupid. The Panick is based on the idea that knowledge is dangerous, forbidden to 'common' people, and only the government elites know how to do things right.