Watch How the World's Population Has Grown Over the Years

Our population remained low - probably less than 1 million people. With the advent of farming, growth picked up.

By AD 1, world population reached approximetely 170 million people. It took 200,000 years for our population to reach 1 billion. And only 200 years to reach 7 billion.

If current trends continue, global population will peak at 11 billion around 2100.

Grouwth is slowing because average fertillity rates are falling in nearly every country.

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Alex E

Ecoclimax is defined by Odum (1969) as the culmination state after a succession in a stabilized ecosystem in which maximum biomass (or high information content) and symbiotic function among organisms is kept per unit of available energy flow.