'The Real Economics of Climate Change: Past, Present, and Future' by Pawan Bhatia is a comprehensive second-edition manuscript arguing that climate change is fundamentally an economic problem rooted in a massive market failure. The book is structured in four parts, tracing the past, present, and future of climate economics, and synthesizing evidence from hundreds of peer-reviewed studies, institutional reports, and historical sources.

Part I: The Past examines how climate shaped economic life over ten thousand years, from early agricultural civilizations through the Little Ice Age, before the industrial revolution's fossil-fuel 'carbon bargain' externalized costs onto the atmosphere, future generations, and the poor. It covers the scientific discovery of climate change from Fourier and Arrhenius to Keeling's measurements, the economic response through Nordhaus's integrated assessment models, and the long political struggle from Kyoto to Paris, marked by industry-funded delay campaigns.

Part II: The Present documents how climate change is already imposing measurable economic costs. It covers the physical reckoning of 1.2–1.3°C warming, the anatomy of disasters and their long-run growth effects, the adaptation gap and finance shortfall, insurance market retreat, agricultural yield declines, water stress, the 'heat tax' on productivity, coastal risks, migration, sovereign debt traps, and the macroeconomic 'new normal' of slower growth and climate-driven inflation. It emphasizes that inequality—both in contributions and impacts—is a central economic force.

Part III: The Future explores scenarios from best-case to worst-case using SSP/RCP frameworks, covering the economics of transition across energy, industry, agriculture, cities, finance, government, markets, technology, and community. It examines geopolitics, ethics, and the growth question, arguing that while the investment gap is large, the transition is technically feasible and economically affordable if pursued with urgency. It highlights tipping points, non-linear risk, and the long view beyond the century.

Part IV: The Bottom Line synthesizes what we know, what remains uncertain, and what we must choose. It concludes that climate change is a grave but not insurmountable threat, and that the future is not predetermined but shaped by human choices made in the coming decade.

The manuscript's central thesis is that the costs of inaction exceed the costs of decisive early action, and that avoiding the worst outcomes requires sustained political will, international cooperation, and a deliberate commitment to equity and intergenerational justice.

The Real Economics of Climate Change

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