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flag Less sunlight correlates with higher U.S. suicide rates, a new study finds.

flag A new study by UConn economist Shinsuke Tanaka finds that reduced sunlight exposure is strongly linked to higher suicide rates in the U.S., with a one-standard-deviation drop in solar radiation tied to a 6.76% increase in suicides—comparable to major risk factors like unemployment. flag Using 25 years of satellite-based solar energy data, the research shows that lower sunlight, especially due to cloudy or rainy weather, correlates with rising depression and suicide-related online searches. flag The findings challenge past assumptions about seasonal suicide patterns and highlight sunlight’s protective role in mental health, raising concerns about solar geoengineering and underscoring the need for greater public health attention to light exposure.

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