Of all the humans who have ever lived, what proportion of them are alive today?

Only a small percentage, anywhere from 5 to 10 percent, of the humans who have ever lived are alive today. Since humans have existed for approximately 100,000 years, the total number that have ever lived is probably between 60 billion and 120 billion.

How many people live on the Earth?

There are approximately 6.7 billion people on Earth. The planet's population is expected to grow to 8 billion by the year 2025 and 9.3 billion by 2050.

What has the world's population been over time?




200 million


275 million


450 million


700 million


1.2 billion


1.6 billion


2.6 billion


3 billion


4 billion


4.85 billion


5.3 billion


6 billion

What factors affect population growth?

Many factors affect the growth in population, including an increase in marital age, increasing education level, increased acceptance of the use of contraceptives in much of the world, wars and military action, and genocide.

How long did it take for the world population to double in size?

From 1959 to 1999, the population went from 3 billion to over 6 billion. How fast is the population growing?

The highest growth rate recorded was around two percent in the late 1950s. This rate has been in decline and is now less than one percent per year.

Which countries lead the world in child poverty?

Child poverty is defined as the number of children from households who earn 50 percent less than the national median. Given this measurement, the countries with the most child poverty are Mexico (26.4%), the United States (22.4%), Italy (20.5%), and the United Kingdom (19.8%).

Which country has the world's highest population density?

Macao, a former Portuguese colony consisting of a peninsula and two islands off the southern coast of China near Hong Kong, has the highest population density in the world. There are 538,000 people living in an 11-square-mile area (28.8 square kilometers).

What is a census?

A census is an enumeration, or counting, of a population. The information from a census is used to help governments determine where to provide services, based on the demographics of the population. Information about age, gender, number of children, race, languages spoken, education, commuting distance, salary, and other demographic variables is common in a census. This information is compiled and provided to government agencies and is usually accessible to the general public.

In the United States and most other developed nations, a census takes place once every decade. The Constitution of the United States requires a census to be taken every 10 years, in order to create districts and determine the number of members of Congress each state is able to send to the House of Representatives.

What was the baby boom?

Due to post-World War II prosperity, there was a boom in American births between 1946 and 1964, now referred to as the "baby boom." During this time, approximately 77 million babies were born in the United States, a very large number compared to that of other time spans. As the baby-boomers approach retirement age, health and welfare services for the elderly will become high priority as the country prepares for a higher proportion of older people in its population than ever before.

Are there an equal number of boy and girl babies born?

Though scientists aren't sure why it occurs, there is an average of 105 boys born for every 100 girls.

How many lesbian and gay people are there in the world?

Most scientists believe that between 1 and 10 percent of the world's population is homosexual. This means that between 6.7 million to 670 million people are gay or lesbian.

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