Billions will have to move because of rising global temperatures, study says

For some decades now, climate specialists have been alerting to the increase in global temperature, which does not stop evolving.

now astudy by the scientific journal Nature, one of the most important in the world, warns of a major problem that may result from this exacerbated global warming.

According to the study, if the Earth warms another 2.7ºC by 2100, billions of people will have to leave their homes because their countries will be too hot.

Bringing even more alarming information, the survey warns that by 2030, 7 years from now, about 2 billions of individuals will be outside the so-called “climate niche”, being exposed to an average of 29ºC continuously.

The climatic niche is a range between 13ºC and 27ºC. Higher or lower temperatures tend to create places that are too arid or humid, too hot or too cold.

According to Timothy Lenton, who is Professor of Climate Change and Earth System Sciences at the University of Exeter and was one of the authors of the study, the abnormal heating of the planet can provoke a forced reorganization of the population mass.

"This is a profound reshaping of the habitability of the planet's surface and could lead to a large-scale reorganization of where people live," he said.

The Nature report also points out that at least 1% of the world's population is already out of the niche climate change, a number that could grow a lot in the next two years, reaching around 600 million people.

One of the co-authors of the study, Chi Xu, a professor at Nanjing University, explains that many of these people may be feeling too cold, rather than too hot.

“Most of these people lived near the coldest 13 degrees Celsius peak of the niche and are now in the 'middle ground' between the two peaks. While not dangerously hot, these conditions tend to be much drier and have historically not supported dense human populations," he said.

The hardest hit countries

Also according to the study, if the Earth warms more than 2.7ºC by the end of the century, the mass exodus due to the heat will mainly affect countries such as Nigeria, India, Indonesia, Philippines and Pakistan.

Including these five countries, which when observed on the map create a kind of strip between Africa and Asia, are the most exposed to this specific climate problem, also according to the lifting.

On the other hand, countries like Burkina Faso, Mali and some islands in the Indian Ocean would be practically emptied because the climate would make it unfeasible to support human life in their territories.

If the heat gets too high, humanity will be threatened

A section of the study in the journal Nature explains that instead of 2.7ºC the earth could warm between 3.6ºC and 4.4ºC by 2100 or even earlier.

In this scenario, half of the world's population would be expelled from the climate niche, which would put humanity at so-called “existential risk”.

That's because this abrupt increase would raise the average temperature to close to 40ºC, which makes human life totally unfeasible.

In places with a dry climate, heat of this magnitude prevents the cultivation of crops and the raising of animals, while accelerating the process of evaporation of water.

In more humid places, such as tropical countries, the humidity can increase so much that the human body becomes unable to retain liquids and mineral salts, leading to dehydration and organ failure.

In addition, both situations can result in human conflicts over resources, the spread of disease and weather catastrophes such as storms, forest fires and extreme droughts.

Experts point out that every effort to reduce global warming is welcome, as even small fractions of temperature increases expose millions of people to suffering.

“For every 0.1 degree Celsius of warming above current levels, about 140 million people will be exposed to dangerous heat,” said Timothy Lenton.

Lenton also regretted that actions to control the emission of carbon dioxide and other vectors of global warming have taken a while to start being put into practice.

According to the specialist, one of the effects of this lethargy is the need, now, to have to act drastically against the rampant warming.

“We have left it so late to tackle climate change properly that we have now reached a point where we can achieve the pace of change we need. we need means something like accelerating by five times the reduction of greenhouse gas emissions or the decarbonization of the global economy”, he stated.

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