It took until 1804 for the world's population to reach the one billion mark, but only a further 123 years to reach two billion in 1927. Population rise during the 20th century really took off. By 1960, three billion had been reached, but within 14 years, in 1974, the total had reached four billion.
The world population has now reached 7 billion people. This milestone
inspired us to conduct research to update our statistics, and the
changes over the past 5 years are remarkable.
The United States Census Bureau (USCB) estimates that by 2027 eight billion people will live on the planet, with the nine billionth mark being reached in 2046.
In...
