A recent study published in the open-access journal PLOS Climate by Amit Roy from Shahjalal University of Science and Technology and The New School for Social Research, U.S. has shed light on the alarming impact of climate change on human lifespan. The study suggests that the cost of climate change might be as significant as six months off the average human lifespan.
Analyzing data from 191 countries spanning from 1940 to 2020, Roy evaluated the correlation between temperature, rainfall and life expectancy while also considering economic disparities using GDP per capita as a control.
The findings reveal a troubling reality for every 1°C increase in global temperature, there is an associated decrease in average human life expectancy of around 0.44 years equivalent to a loss of about 5 months and 1 week. Moreover, a 10-point increase in a composite climate change index factoring in both temperature and rainfall could lead to a six-month reduction in average life expectancy. Women and those in developing nations are expected to be disproportionately affected by these changes.
Dr. Roy hopes that the introduction of this composite climate change index will standardize global discussions on the issue offering a metric accessible to the public and fostering cooperation among nations to address climate change impacts.
The study underscores the urgent need for mitigating greenhouse gas emissions and adapting to a changing environment. It emphasizes the necessity for localized studies focusing on specific severe weather events like wildfires, tsunamis and floods which cannot be fully captured through temperature and rainfall analysis alone.
Dr. Roy adds a poignant note stating, “The global threat posed by climate change to the well-being of billions underscores the urgent need to address it as a public health crisis.” This study highlights that mitigation efforts to reduce greenhouse gas emissions and proactive initiatives are essential to safeguard life expectancy and protect the health of populations worldwide.
This study serves as a wake-up call, urging individuals, communities and nations to take decisive action to combat climate change and ensure a sustainable future for all.
