Freshwater and Global Irrigation Dependence

Many of us were taught that humans have been the dominant force shaping the modern world through sheer grit, ingenuity, and innovation. While true to an extent, there are also deep, embedded laws of energy that have both constrained and enabled human cleverness and our influence over our surroundings. What exactly are these laws, and what happened in the past few centuries that allowed for an explosion of technology and consumption? Perhaps more importantly, how can that knowledge help us understand how the decades and centuries ahead might be different?

In this episode, Nate is joined by earth scientist and thermodynamicist Tad Patzek for a deep dive into the mathematics and physics driving humanity's energetic and material predicament. Tad walks us through the six great flows of power and materials that keep civilization running, and explains why our public conversation about all of them is dangerously detached from physical reality. He argues that planetary breakdown is not merely a side effect of an economic system built on growing these flows – it is a direct mathematical consequence of overshoot. He rounds out this picture by pointing out that every energy transition in history has been additive, not subtractive – increasing total power in the system – and the current push toward renewables is no exception.

What if we were to truly see ourselves through the lens of all the energy we consume – for Americans, the equivalent of a 40-ton whale – would that change how we live? How do technology, population, and per capita energy consumption amplify each other, creating an exponential demand for power? And if we were to acknowledge the inseparability of our ecological crises and our energy blindness, would it help us change our behavior in accordance with the kind of world we'd want our grandchildren to inherit?

(Conversation recorded on March 11th, 2026)\

About Tad Patzek:

Tad Patzek is Professor Emeritus of Petroleum and Chemical Engineering at the Earth Sciences Division and Director of the Ali I. Al-Naimi Petroleum Engineering Center in KAUST, Saudi Arabia. Formerly, he was the Lois K. and Richard D. Folger Leadership Professor and Chairman of the Petroleum and Geosystems Engineering Department at The University of Texas at Austin. Additionally, he was previously a Professor of Geoengineering at the University of California, Berkeley. Prior to joining Berkeley, he was a researcher at Shell Development, a research company managed for 20 years by M. King Hubbert. He is also a full Presidential Professor in Poland, which is the highest honor, and also served as a member of the DOI Macondo Well Advisory Committee.

Patzek's current research involves mathematical and numerical modeling of earth systems with emphasis on fluid flow in soils and rocks that can be hydrofractured. He is working on the thermodynamics and ecology of human survival, and food and energy supply for humanity. His current emphasis is the use of unconventional natural gas as a fuel bridge to the possible new energy supply schemes for the world. Patzek is a coauthor of over 400 papers and reports, and most recently, he has cumulated his research into his upcoming book Thermal Power and Climate Change: A Data-Driven Analysis of Cause and Effect, 1800-2100 (Preprint available now)

Show Notes and More

Watch this video episode on YouTube

Want to learn the broad overview of The Great Simplification in 30 minutes? Watch our Animated Movie.

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