According to him, yesterday the milestone of eight billion inhabitants was passed. United Nationsthe population of the planet. However, as it turns out, after the post-war population boom in the mid-20th century, population growth slowed down. It will take 15 years before we reach the next milestone of nine billion people on the planet, and we won’t reach ten billion until 2080.

John Wilmort, head of the UN’s population program, stressed that increasing the world’s population to eight billion is a human success, but at the same time poses risks for the future, especially in resource-poor areas. Secretary General of an international organization António Guterres said yesterday that “the milestone we have reached is an opportunity to celebrate the diversity and achievements of humankind and recognize our shared responsibility for the planet.” The United Nations, after all, attributes population growth to a number of factors, such as, for example, a significant development in the provision of public health services, which increased life expectancy and reduced the likelihood of premature death, improved nutrition, and so on. After all, there may be an explanation for this slowdown in world population growth.

Over the past 40 years, sperm concentration has fallen by 50% and is declining faster than before.

A study published in the journal Human Reproduction Update shows that the concentration of sperm in men’s semen decreased from 101.2 million per ml to 49 million per ml between 1973 and 2018. The same scientific team, in a study published in 2017, found that sperm concentrations have dropped by 50% over the past 40 years and are declining faster worldwide than before. The author of the study, Professor Haggai Levin of the Hebrew University of Jerusalem, notes that “the evidence we have collected shows that something is wrong with the planet, and we need to act before we approach the point of no return.”

Previous studies show that the sperm count has fallen below 40 million per ml. Although recent estimates are well above this threshold, Prof. Levin notes that the number of men already experiencing fertility problems should have increased. Scientists in the latest study took into account factors such as participants’ age and duration of abstinence and excluded men with known fertility problems, but its reliability is considered limited because it did not evaluate other factors in sperm quality.