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Heatwaves have recently spread across India. A new study finds that by the end of the century, the country will have the largest population affected by extreme heat due to global warming.
If the current pace of global warming is not brought under control, it will push billions of people out of the “climate environment,” the temperatures in which humans can thrive, and expose them to dangerously hot conditions, according to A new study was published Monday.
The study, published in the journal Nature Sustainability, assessed the impact on humans if the world continues on its projected course and warms 2.7°C by the end of the century, compared to pre-industrial temperatures.
Taking into account both projected global warming and population growth, the study finds that by 2030 around 2 billion people will be outside the climate spectrum, facing average temperatures of 29°C (84°F) or higher, with about 3.7 billion people living outside climatic zone. standing by the year 2090.
said Timothy Linton, one of the study’s lead authors A third of the world’s population may find themselves living in it Climatic conditions that do not support “human flourishing”.
According to the report, the designated place consists of places where the average temperature ranges from 13°C (55°F) to around 27°C (81°C). Outside this window, conditions tend to be too hot, too cold, or too dry.
The study determined that while less than 1% of the world’s population is currently exposed to Serious heat, with Average temperatures are 29°C or higher, and climate change has already put more than 600 million people outside the proper range.
Most of these people lived near the 13°C cold peak where it is and are now in the “middle ground” between the two peaks. Although not dangerously hot, these conditions tend to be drier and have not historically supported dense human populations. Study co-author Qi Shu said, Professor at Nanjing University.
If the Earth’s temperature rises 2.7 degrees Celsius, IndiaNigeria, Indonesia, the Philippines and Pakistan were the top five most populous countries exposed to dangerous heat levels, the study found.
The entire population of some countries, such as Burkina Faso and Mali, as well as small islands that are already at risk of rising sea levels, will face unprecedentedly high temperatures.
In a worst-case scenario, if the Earth’s temperature rises by 3.6 or even 4.4 degrees Celsius by the end of the century, half the world’s population will be outside the appropriate climate range, posing what the report calls an “existential risk.”
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The past eight years have been the warmest on record.
According to the report, living outside designated habitat can lead to increased mortality rates, as exposure to temperatures above 40 degrees Celsius It can be fatalEspecially if the humidity is too high, the body can no longer cool itself down to a temperature that can be maintained normal jobs.
The extreme heat is also expected to lower crop yields, increase conflict and spread disease.
Scientists have long warned that a temperature rise beyond 1.5°C will cause this to happen Catastrophic and potentially irreversible changes. As the regions within the climate niche shrink as global temperatures rise, a larger segment of the population will be exposed more frequently to extreme weather events including droughts, storms, wildfires, and heatwaves.
Experts say there is still time to slow the pace of global warming by moving away from burning oil, coal and gas and toward clean energy, but the window is closing.
Linton said every bit of class would make a difference. “For every 0.1°C of warming above current levels, about 140 million additional people will be exposed to dangerous heat.”
Earlier this month, the World Meteorological Organization announce that within the next five years, there is a 66% chance that the planet will be 1.5°C warmer than pre-industrial levels for at least one year.
“We’ve left it so late to get climate change right that we’re now at a point where to achieve the rate of change that we need means something like accelerated reductions in greenhouse gas emissions or decarbonisation,” Linton said.
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