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Crop-damaging temperatures increase suicide rates in India
1Agricultural & Resource Economics, University of California, Berkeley, CA 94720; tcarleton@berkeley.edu.
Summary
Rising temperatures significantly increase suicide rates in India, particularly during the agricultural growing season. Climate change is linked to tens of thousands of suicides, highlighting the impact of environmental factors on mental health.
Area of Science:
- Environmental Science
- Public Health
- Economics
Background:
- Suicide is a major global health issue, disproportionately affecting developing countries.
- India accounts for a significant portion of global suicides, with rates doubling since 1980.
- Drivers of suicidal behavior in low-income populations remain understudied.
Purpose of the Study:
- To investigate the link between climate fluctuations and suicide rates in India.
- To quantify the impact of temperature on self-harm in a developing country context.
- To assess the role of agricultural income and adaptation in climate-related suicide trends.
Main Methods:
- Analysis of nationally comprehensive panel data spanning 47 years.
- Statistical examination of the relationship between daily temperature variations and suicide occurrences.
- Assessment of the influence of the agricultural growing season on climate-suicide correlations.
Main Results:
- A 1°C increase in daily temperature above 20°C is associated with approximately 70 additional suicides.
- This effect is pronounced during the agricultural growing season, coinciding with heat-induced crop yield reductions.
- No evidence of adaptation through acclimatization or rising incomes mitigating the effect was found.
Conclusions:
- Climate change, specifically warming temperatures, is a significant driver of increased suicide rates in India.
- An estimated 59,300 suicides over 30 years are attributable to warming, representing 6.8% of the upward trend.
- Findings underscore the critical link between environmental factors, agricultural income, and self-harm in developing nations.
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