Citing $69 Trillion Price Tag by 2100, Moody's Warns Central Banks of Far-Reaching Economic Damage of Climate Crisis

Noting previous warnings that the human-caused climate crisis could cause trillions of dollars in damage to the global economy by the end of the century, a new report from Moody's Analytics explores the economic implications of the international community's failure to curb planet-warming emissions.

Moody's Analytics chief economist Mark Zandi told The Washington Post--which first reported on the new analysis--that this is "the first stab at trying to quantify what the macroeconomic consequences might be" of the global climate crisis, and it comes in response to European commercial banks and central banks. The climate emergency is "not a cliff event. It's not a shock to the economy. It's more like a corrosive," Zandi added. But it is "getting weightier with each passing year."

The financial research and consulting firm's analysis (pdf) highlights a few key projections from a report published last October by the U.N. Intergovernmental Panel on Climate Change (IPCC): if the average global temperature soars to 1.5degC above pre-industrial levels--the lower limit of the Paris climate agreement--the cost to the global economy is estimated to be $54 trillion in 2100, and under a warming scenario of 2degC, the cost could reach $69 trillion.

Moody's--whose clients include multinational corporations, governments, central banks, financial regulators and institutions, retailers, mutual funds, utilities, real estate firms, insurance companies, and investors--notes researchers have found that "warming beyond the 2degC threshold could hit tipping points for even larger and irreversible warming feedback loops, such as permanent summer ice melt in the Arctic Ocean."

One of the key takeaways, the report emphasizes, is that economically, "the more draconian effects of climate change are not felt until 2030 and beyond. And they do not become especially pronounced until the second part of the century."

"That's why it is so hard to get people focused on this issue and get a comprehensive policy response," Zandi told the Post. "Business is focused on the next year, or five years out."

"Most of the models go out 30 years," he said, "but, really, the damage to the economy is in the next half-century, and we haven't developed the tools to look out that far."

Responding to the Post report, which emphasized Moody's warning of the anticipated damage to the global economy, some advocates of ambitious global action to slash human-generated greenhouse gas emissions pointed to recent findings from climate experts that the world's temperature could rise 3degC or higher by 2100, implying that the economic costs could exceed the IPCC's upper estimate.

Moody's analysts examined the climate emergency's expected economic damage across six impact channels--sea-level rise, human health effects, heat effect of labor productivity, agricultural productivity, tourism, and energy demand--and created forecasts through 2048.

"This analysis reveals that some countries are significantly exposed to rising temperatures while others, particularly in Northern Hemisphere climates, are well insulated," the report says. Those at the greatest risk, analysts found, are "countries in hot climates, particularly those that are emerging economies such as Malaysia, Algeria, the Philippines, and Thailand, and oil producers such as Saudi Arabia, Qatar, and Oman."

On the agricultural front, rising temperatures are expected to impact both the health of farmworkers and crop yields, which particularly threatens less-developed nations that are economically dependent on farming. Echoing a U.N. report published this week, Moody's notes that "heat stress, determined by high temperature and humidity, lowers working speed, necessitates more frequent breaks, and increases the probability of injury."

The report says that in terms of human health, the number of heat-related deaths worldwide is expected to increase as the global temperature does, and a hotter world "can lengthen the season and increase the geographic range of disease-carrying insects such as mosquitoes, ticks, and fleas, allowing them to move into higher altitudes and new regions."

Recognizing some limitations of its analysis, Moody's acknowledges that "there are a number of factors that were not considered in this work. The foremost of these is the increasing frequency and severity of natural disasters." The report points to a U.S. government calculation that in the United States alone, disasters caused more than $300 billion in damage in 2017.

As the environmental legal organization Earthjustice concluded in response to the report, "We literally cannot afford inaction on this crisis."