The strange phenomenon happened right after the Black Death pandemic

A very terrible event, leaving one-third of Europe's population disappear. Ironically, it brings an effect that can make many people happy.

The Black Death is the name of a pandemic (thought to be the plague) that occurred in Asia and Europe in the 14th century, and it is among the worst pandemics in human history. Within a few decades, more than 20 million people were killed, reducing at least 30% of the European population at that time.

The Black Death is one of the most terrible epidemics in humankind.

That event was really terrible and it was evidence that how old the world might be. But according to a study from Harvard University, there was a very unexpected effect after the pandemic ended. Those are positive reactions from the environment.

In particular, experts have tracked the global pollution process over time, through the analysis of ice cores with the most advanced technologies. The results show that the mining, metallurgy and related industries are the most polluting factors. Through it, we have pushed a large amount of lead into the environment : including the atmosphere and water.

Talking about lead, this is a very toxic metal. If it enters the body - whether it is through breathing or eating, lead destroys the nervous system and digestive system, regardless of whether it is human or animal. In the capital environment, there is not too much lead, but through mineral exploitation starting 2000 years ago, the concentration of lead gradually increased to dangerous levels.

At the time of the Black Death peaked, the atmosphere at that time had no signs of lead.

After monitoring the density of lead in ice cores, Harvard's team found the strange phenomenon during the period of the Black Death peaked (1349 - 1353). At that time there was no sign of lead , and that was the only time that humanity enjoyed it in the past 2000 years.

Explaining this, the authors argue that having too many people die in a short time has made the mining process plummet. People at that time must prioritize existence, instead of economic development with minerals.

"During the pandemic the Black Death, the population and the economy almost collapsed and the metal mining process stalled. And thanks to that, the air became clearer, lead levels were lower. to the point of being undetectable, "- Alexander F. More, one of the study authors said.

According to More, there may be some other causes. However, the level of reduction of lead in this period is very significant, it requires a really big event to be explained. And in this case, it is the Black Death.

Density of lead in the air through each stage.

However, the results of the study also caused much debate. Evidence shows that the overcrowding of the population has put great pressure on the Earth, which has led many to suggest that the Earth has "cured" itself by eliminating "pathogens" - in this case it is human.

This idea is somewhat cruel, but also partly reflects the extremely important task of countries around the world as population control . The controlled population will reduce the amount of resources needed, reduce the amount of lead in the atmosphere, and obviously the plastic waste crisis is not as terrible as it is today.