A new study published in the scientific journal Nature Geoscience warns that tropical regions of planet may become uninhabitable for humans if global warming is not limited to 1.5 degrees Celsius.
Rising temperatures and humidity threaten to subject a significant portion of the global population to potentially lethal conditions.
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The study, conducted by Princeton University in the United States, highlights that the extreme heat resulting from global warming is a critical concern for growing populations in tropical areas.
The human body's ability to regulate temperature depends on air temperature and humidity conditions.
There is a critical survival limit, beyond which the human body can no longer effectively control its thermal levels.
This limit is reached when the wet bulb thermometer, which measures the lowest temperature achievable only by the evaporation of water, exceeds 35 degrees Celsius.
(Image: Aly Song/Reproduction)
When this value is exceeded, the human body loses its ability to cool itself through the evaporation of sweat, making high temperatures dangerous and potentially fatal.
O increase in global temperature it must be limited to 1.5 degrees Celsius to prevent tropical regions from exceeding this critical limit.
Tropical regions, which encompass areas around the Equator, have a large portion of the world's population, and the study warns that such areas could experience “extreme heat events” in the coming years capable of exceeding the “limit of security".
The world has already warmed by around 1.1 degrees Celsius in recent decades, and despite efforts under the Paris Agreement to restrict the temperature increase to 1.5 degrees, scientists warn that this limit could be exceeded in a decade.
This has significant implications for the global population, as around 40% of it resides in tropical countries, a number that is expected to grow to half of the global population by 2050.
The Princeton University study focused on tropical regions between 20 degrees north of the Equator and 20 degrees south. These areas are located within the territory of countries such as:
Pakistan;
Libya;
India;
China;
U.S;
Brazil;
Madagascar;
Northern Australia.
The research emphasizes the urgency of meeting global climate goals to avoid a potentially uninhabitable future in tropical regions.
