World PopulationHow many people live in the world?As the rapidly increasing world population?The main causes of the world's population growth?Forecasts

According to estimates of the UN Population Fund

• 1 billion - 1820• 2 billion - 1927• 3 billion - 1960• 4 billion - 1974• 5 billion - July 1987• 6 billion - October 1999• 7 billion - 31 October 2011• If population growth dynamics will not change,

the line of 8 billion people will be overcome in about 2024

The main causes of the world's population growth?

• Improving living conditions

• Reduced mortality• Resourcing

The data are taken from the website:

http://www.census.gov/popclock/