Why Global Warming Is a Serious Threat to Our Mental Health - Article Health

Global temperatures have risen about 1 degree Celsius (or 1.8 degrees Fahrenheit) since preindustrial times and could rise another half degree by 2030, according to a report released this week by the United Nations. Experts say that increase would be catastrophic to the environment, triggering changes in extreme weather, sea levels, and animal populations, to name just a few of the predicted consequences.

Researchers say that this continued rise in temperatures has had other effects, too, on everything from the economy to disease and famine rates. And according to a study published this week in the Proceedings of the Natural Academy of Sciences, it’s also linked to an increase in mental health problems.

The study first looked at more than 2 million responses to an annual government survey that asked people about their mental health over the last 30 days, collected over a 12-year period. They found that people were 0.5 percentage points more likely to report issues like stress, anxiety, and depression during months when the average temperature was above 30 degrees Celsius (86 degrees Fahrenheit), compared to months when the temperature averaged between 25 and 30.

In other words, “people report more mental health problems when it’s really hot out,” says lead author Nick Obradovich, PhD, a research scientist at the Massachusetts Institute of Technology's Media Lab.

That small increase may not seem like a lot, but Obradovich says that if those numbers were extrapolated across the entire country, it would mean almost 2 million more people reporting mental health problems. And looking forward, he and his coauthors wrote in their paper, “we observe that days with temperatures that exceed 30 degrees C are likely to become more common in the future … particularly in the U.S. South.”


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