Research says global warming exacerbates economic inequality between countries
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The study, published in the Proceedings of the National Academy of Sciences on the 22nd, shows that global warming caused by increased concentrations of greenhouse gases in the atmosphere has made countries such as Norway and Sweden more affluent, but has dragged down countries such as India and Nigeria. The rate of economic growth ultimately leads to economic inequality in various countries of the world, and it also means that cold regions are richer than hot regions.
The researchers analyzed the relationship between annual average temperature and gross domestic product (GDP) in more than 100 countries and regions between 1961 and 2010, and found that in countries with temperatures above average, the economic growth rate of countries in cold regions Accelerate, the economic growth of countries in hot regions is slowing down.
Noah Dieffenbo, the first author of the paper and a professor at Stanford University, said that global warming has made many poor countries in the world poorer, while most rich countries have become richer.
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Studies show that during the past 50 years, the world's poorest countries have 17% to 30% less per capita wealth than those without global warming, and the gap between the highest national economic output per capita group and the lowest per capita economic output. It is about 25% more than the scenario where global warming does not occur. Although the degree of economic inequality between countries is shrinking during this period, if there is no global warming, the rate of reduction should be faster.
Marshall Burke, another author of the paper and assistant professor at Stanford University, said that when the temperature is not high or low, crops are more productive, people are healthier and work more efficiently, which means that a slight increase in temperature is good for cold countries. However, it is difficult to bring benefits to the economic growth of countries in hot regions.
This study does not clearly show how global warming will affect the economies of mid-latitude temperate climate countries. Burke believes that some countries' current temperatures are suitable for economic growth, but as global warming intensifies, these countries may be separated from the "optimal temperature zone."