How many people on the planet and on what does it depend on?

A question of considerable interest fromchildren to the elderly: "How many people on the planet?" Of course, it's impossible to answer with one hundred percent accuracy, because every minute someone in the world is born and someone dies. It is estimated that in 2012, a seven-billion-strong man on Earth was born from now living, hence the answer to the question of how many people on the planet now - more than seven billion.

Forty thousand years before our eraabout forty billion people were born, and in the 1990s about fifteen billion. In 1900 there were no more than two billion people on Earth, and in 1950 more than two and a half, in 2005 - more than five. As we can see, the population began to grow intensively only 120 years ago.

What determines how many people on the planet

During illnesses and epidemics, a hugenumber of people. For example, from the plague from 1346 to 1352 gg. Bubonic plague, Great sea, black death - the so-called this terrible disease. It destroyed a quarter of the world's population. Blackpox - from her one hundred thousand people died. This disease spared no one. The outbreak stopped only after vaccination. Acute intestinal infection - cholera - claimed the lives of more than forty-three million people. Typhus, accompanied by a mental disorder against the background of fever, claimed more than three million lives. From malaria, tropical fever a year, up to three million people die. From AIDS, more than forty million died, "the plague of the twenty-first century" is the second name of the virus. We see how many people on the planet have died and continue to die from various diseases.

Hygienic procedures until the twentieth centurythe majority of the population neglected. Consequently, infections developed, immunity weakened, and life expectancy decreased. Only the rich could use soap. Those who still followed the purity (there were not many of them), but did not have the opportunity to buy soap, used various tinctures on ashes and cleanings.

The lack of drugs also affected the fact,how many people on the planet Earth could live. Antibiotic, the strongest antimicrobial drug, was discovered in 1928 by Alexander Fleming. For this discovery, he received a Nobel Prize. Later, antifungal agents and antiviral drugs appeared. Today we can go to the pharmacy and buy a lot of medicines, and only a hundred years ago our ancestors could be treated only with herbs, and that's not always the case.

Medicine took a step forward: surgery, organ transplantation, the appearance of various drugs to maintain the vital functions of the organs - all this allowed to increase the life expectancy of the population.

During the formation of states there were manywars for territories. During the Second World killed more than fifty million people, in the First - more than twenty-five million. In the whole history of the world, about 15,000 wars have passed, and more than three and a half billion people have died.

How many people on the planet depend directly andfrom how many are born. One hundred and fifty years ago, there were seven deaths per ten newborns. With the advent of maternity clinics, qualified care of doctors, the death rate of newborns has decreased thousands of times.

All these factors have influenced and continue to affect the population of the Earth. According to the scientists' forecasts, by 2050 there will be more than eleven billion people on the planet.