How carbon dioxide, the world’s most important substance, shaped the planet’s past and present—and holds the key to our future.
THE STORY OF CO2 IS THE STORY OF EVERYTHING
by Peter Brannen
Ecco, August 2025
(via DeFiore and Company)
Every year, we are dangerously warping the climate by putting gigantic amounts of carbon dioxide into the air. But CO2 isn’t merely the byproduct of burning fossil fuels—it is also fundamental to how our planet works. All life is ultimately made from CO2, and it has kept Earth bizarrely habitable for hundreds of millions of years. In short, it is the most important substance on Earth. But how is it that CO2 is as essential to life on Earth as it is capable of destroying it?
In THE STORY OF CO2 IS THE STORY OF EVERYTHING, award-winning science journalist Peter Brannen reveals how carbon dioxide’s movement through rocks, air, water, and life has kept our planet’s climate livable, its air breathable, and its oceans hospitable to complex life. Starting at the dawn of life almost 4 billion years ago, and working all the way up through today’s global climate crisis and beyond, he illuminates how CO2 has been responsible for the planet’s many deaths and rebirths, for shaping the evolution of life, and for the development of modern human society. And he argues that it’s only by reckoning with this deep planetary history that we can understand the cosmic stakes of our current moment on Earth—and how dangerous our experiment with the climate really is.
With groundbreaking research and a clear-eyed perspective, Brannen shows how a deep exploration of the carbon cycle across our planet’s history can shed light on the way forward for humanity, as we try to avert environmental catastrophe in the future. And it all begins with a richer understanding of the critical role of CO2 in our world.
Peter Brannen is a contributing writer at The Atlantic. He is the author of The Ends of the World, about the biggest mass extinctions in Earth’s history. His work has also appeared in the New York Times, the Washington Post, and other publications.
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