The economic costs of global warming..

 The Stern Review done in 2006 estimated that the rising costs of escalating global warming will grow to 5% or more of the gross domestic product of all the nations on Earth.

This means that 5% of the world’s total gross domestic product will be lost to emergency recovery from global warming-related consequences. For an economic comparison and perspective, consider that the Great Depression of the 1930s in the United States was the result of only a 4% loss in U.S. gross domestic product.

Newer studies from 2015 project that if the average global temperature increase reaches 6° Celsius (10.8° Fahrenheit) by the end of the century, the nations of the world will be spending from 10% up to a possible 30% of their total gross domestic product recovering from an endless stream of mega global warming-related consequences and catastrophes on the final road to extinction. The current GDP of the world is about $80 trillion a year; by 2100 it may double or triple that. This means we could be spending one-third of the world’s GDP in 2100—about $100 trillion a year—just to try to survive extinction from global warming.

If we are able to avoid global warming extinction, the total estimated costs of all related global warming destruction could be in the range of $400-$600 trillion—about eight years of the current total gross domestic product for every nation on Earth. To put this in perspective, this means that if we fail to successfully resolve global warming now, farther down the road we will have to dedicate 5 to 8 times the total current value of all annual global human productivity to try to recover from the global warming consequences.

Worse yet, that is only what we may have to pay if we are lucky. If we go into irreversible or extinction-level climate destabilization, what will the cost be then?

Additionally, all of the related financial costs of global warming-related catastrophes and emergencies will rapidly diminish any existing national emergency recovery safety nets. This will cause unthinkable suffering among those who are not prepared and who will consequently have no governmental safety net.

Escalating global warming started out as an ecological threat. It has now become the world’s greatest security threat and threat multiplier. Over time, one of the most costly consequences of escalating global warming will be the regional, national and international conflicts and wars it will create, intensify, or prolong.