I recently told you that global warmingclimate is now a more serious threat to human life and health than the COVID-19 pandemic. Direct and indirect consequences are difficult to overestimate - densely populated regions will go under the water, crops will suffer greatly as a result of droughts and climatic cataclysms, many areas with green vegetation will turn into deserts, “climate wars” will arise, etc. According to the Paris Agreement, in order to avoid a catastrophe, the temperature rise must be stopped at 1.5 degrees Celsius. However, experts agree that this goal is unlikely to be achieved. But what will happen if, for example, the temperature rises not by one and a half, but by two degrees? According to a study by the UK Met Office, a billion people will be affected as a deadly combination of extreme high temperatures and high humidity reigns on Earth.
At what air temperature can even healthy people die?
Experts from the Met OfficeGreat Britain assessed the critical wet bulb temperature for humans, which does not show the real temperature of dry air, but an indicator, taking into account high humidity. If this temperature reaches 35 degrees Celsius, the human body will not cope with thermoregulation due to sweating. In other words, the body will no longer be able to cool itself.
As a result of this temperature, the body beginsgradually die. Therefore, even absolutely healthy people at this temperature, arriving in the shade, will die within six hours. At 32 degrees wet bulb, workers need to take regular rest to avoid heatstroke, according to a study by scientists.
If the efforts of all mankind do not succeedstop the temperature rise on the planet at a relatively safe level, and it will increase by 4 degrees Celsius, then half of the world's population will be exposed to such deadly temperatures.
Extreme natural disasters, hunger and extreme heat
Despite the fact that the average temperature is not on Earthin comparison with the pre-industrial period, it has increased still slightly, and has not even reached the level established by the Paris Agreement, tens of thousands of people die every year from heat waves.
Over the past decade, according to experts,the number of extreme heat waves in cities has tripled. More than a quarter of the population was affected by high temperatures in the United States last year. People have complained of symptoms such as nausea and cramps that accompany heat stress. Between 1998 and 2017, according to WHO, 166,000 people died from heatwaves. As noted in the study, if the temperature on the planet rises by 2 degrees, the situation will worsen 15 times.
But, in addition to the direct threat that it carries forhuman health global warming, there are a number of no less dangerous indirect. These include floods, wildfires, droughts, food crises, and more.
“Any climatic impact representsare frightening prospects for the future. And severe climate change will have many consequences, ”says Andy Wiltshire of the UK Meteorological Office.
Research has shown that at greatest riskturned out to be tropical countries such as Brazil, India, Ethiopia, etc. Even now temperatures here are sometimes at the limit of human vitality. Accordingly, with an even greater increase in temperature, they will simply become unsuitable for normal life. However, this does not mean that other regions, including Europe, will not be affected.
According to research that has been carried out yetin 2015, the Gulf will be hit by heatwaves that will exceed human survival. In addition, scholars point to China. The plain in the north is one of the most densely populated on the planet. It is also one of the largest food production zones. Therefore, when the temperature rises in this region, there will be the greatest number of victims.
Finally, I note that all these apocalypticscenarios threaten humanity not in the distant future, after hundreds of years, but in the near future. And we are already beginning to feel them. I recently talked about the fact that in 10 years there will be absolutely no glaciers in Africa, which could significantly affect the region.