Social cost of carbon: What is it, and why do we need to calculate it?
Published Date: 4/2/2021
Source: phys.org
There are many policies that could potentially curb carbon dioxide emissions and slow global warming. Some are projected to cost trillions of dollars for governments and taxpayers. And yet, society will also pay a price if it doesn't do enough to combat climate change. According to a new survey, if we don't act fast, climate change could cost the world some $1.7 trillion a year by 2025, increasing to about $30 trillion a year by 2075. The Fourth National Climate Assessment found that if global temperatures rise 2.4˚C, it could result in a loss of 0.5 to 2.5% in GDP by 2090; if the temperature rise reaches 4.7˚C, GDP loss could reach 6%. (For comparison, millions of Americans lost their jobs and were thrust into poverty when the GDP fell by 3.5% in 2020. A study focusing on the U.S. estimated that the GDP would decrease by 1.2% for every 1˚C increase in global warming.