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What is to be done? No challenge summons this question more urgently than the global challenge of transitioning to clean, efficient, and renewable energy sources. This is the question that the authors have set out to answer. Over the course of eight probing conversations, the authors consider the strategies that will point toward a sustainable future and the changes of heart and mind that will inspire the will and strength to achieve it. The authors urge readers to build a future based on a deeper appreciation for the shared humanity and the planet.