The population of Earth will hit the 7 billion mark by the end of the month, analysts say. As evidence that the population is growing at an ever-increasing rate, scientists state that around 1.4 billion people are old enough to remember the arrival of the 6 billionth, 5 billionth, 4 billionth and 3 billionth people, according to LiveScience.com.
Analysis of the human population shows that in 8,000 B.C. there were only 5 million inhabitants on the planet. The numbers began to increase when humans developed agriculture, reaching 100 million people around 500 B.C. The number decreased significantly during the plagues and wars during the 1400s, but since then have been rising steadily.
The world population reached 2 billion in the late 1920s, with most estimates marking 1927 as the big year. In 1959, during the height of the Cold War, Earth's population reached 3 billion. The 4 billionth baby came in 1974, only 15 years after the last billion benchmark.
The year 1987 brought about the 5 billionth person, and a new holiday – World Population Day. The holiday has been celebrated on July 11 every year since then, as that was the date analysts estimated the 5 billionth baby was born.
Adnan Nevic, a baby born in Sarajevo, Bosnia on October 12, 1999 was labeled as the world's 6 billionth baby, according to the news source. Nevic is now 12 years old, and already the 7 billionth baby's mother is in her final stages of pregnancy.
What will it mean to have 7 billion people on Earth? Scientists paint a grim picture. Unless populations stabilize, the world's agriculture system will experience severe strain, and economic setbacks will likely be experienced by some of the world's most impoverished nations, according to CNN.