COP30 won’t tackle fossil fuel companies – but global tax reform might

Jessica Green, author of a new book, says climate diplomacy focuses too much on technical goals such as net zero and offsetting instead of redirecting the flow of dollars to accelerate decarbonization. Interview by Mike Higgins.

The World Today

Published 15 September 2025

Updated 17 September 2025 — 5 minute READ

Image — Jessica Green says the COP summits have done little to effectively decarbonize. Photo: Dominika Zarzycka/SOPA Images/LightRocket via Getty Images.

Jessica Green

Professor of political science, University of Toronto

In your book ‘Existential Politics: Why Global Climate Institutions are Failing and How to Fix Them’, you argue that policies such as net zero, carbon pricing and offsetting will fail to decarbonize economies and play into the hands of fossil fuel companies. How is that?

The book’s main argument is that we are addressing the wrong problem in the global climate regime. We are too focused on ‘managing tons’ – technical processes such as carbon pricing, offsetting and net zero. Instead, we should be tackling the bigger question: how do we reorient the flow of dollars in the economy to decarbonize our society? For decades, climate change has been seen as a problem to be solved by mitigation through collective action, rather than as a contest between fossil asset owners and green asset owners. 

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