From the McKinsey site https://www.mckinsey.com/business-functions/sustainability/o… :
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The transformation of the global economy needed to achieve net-zero emissions by 2050 would be universal and significant, requiring $9.2 trillion in annual average spending on physical assets, $3.5 trillion more than today… Accounting for expected increases in spending, as incomes and populations grow, as well as for currently legislated transition policies, the required increase in spending would be lower, but still about $1 trillion.
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Hmm, so accounting for current spending, laws, and expected changes in population and wealth, we go from a top line number of $9.2 trillion per year down to $1 trillion per year. That’s an enormous difference.
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The economic transformation required to achieve net-zero emissions by 2050 will be massive in scale and complex in execution, yet the costs and dislocations that would arise from a more disorderly transition would likely be far greater, and the transition would prevent the further buildup of physical risks. It is important not to view the transition as only onerous; the required economic transformation will not only create immediate economic opportunities but also open up the prospect of a fundamentally transformed global economy with lower energy costs, and numerous other benefits—for example, improved health outcomes and enhanced conservation of natural capital.
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The improved health outcomes mentioned in passing above are enormous and potentially offset the entire cost of the transition, or more. A recent Harvard study attributed 8 million deaths in 2018 alone to fossil fuel air pollution, 1/5 of deaths that year. The economic costs of illness and death, caused by burning coal, oil, gas and to a much lesser extent, natural gas, are staggering.
https://www.hsph.harvard.edu/c-change/news/fossil-fuel-air-p…
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The study, “Global Mortality From Outdoor Fine Particle Pollution Generated by Fossil Fuel Combustion,” published in Environmental Research, is based on a groundbreaking analysis that enabled the researchers to directly attribute premature deaths from fine particulate pollution (PM 2.5) to fossil fuel combustion.
“Often, when we discuss the dangers of fossil fuel combustion, it’s in the context of CO2 and climate change and overlook the potential health impact of the pollutants co-emitted with greenhouse gases,” said Dr. Joel Schwartz, Professor at Harvard Chan School and co-author of the study. “We hope that by quantifying the health consequences of fossil fuel combustion, we can send a clear message to policymakers and stakeholders of the benefits of a transition to alternative energy sources.”
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