WORLD HISTORY

Detailed explanation-1: -The world population increased from 1 billion in 1800 to around 8 billion today. The world population growth rate declined from around 2% per year 50 years ago to under 1.0% per year. Other relevant research: Future population growth – This article focuses on the future of population growth.

Detailed explanation-2: -In 1800, when the Industrial Revolution began, there were approximately 1 billion people on Earth. Continued agricultural expansion and extraction of fossil fuels and minerals led to rapid global economic growth and, in turn, population growth in the 19th century.

Detailed explanation-3: -By the time of the Industrial Revolution, there were more people than ever before. A main reason for this was 18th century agricultural improvements, which all but ended the periodic famines that had kept down European populations.

Detailed explanation-4: -Owing most of their population growth to the expansion of industry, U.S. cities grew by about 15 million people in the two decades before 1900. Many of those who helped account for the population growth of cities were immigrants arriving from around the world.