At present there is still space enough on Earth for humans, wildlife and wild places; but what of the future?

The Increase in Population

It took from To reach
Neolithic Age to birth of Christ (10,000 years) 300 million
Birth of Christ to 1650 (1650 years) 500 million
1650 to 1850 (200 years) 1 billion
1850 to 1925 (75 years) 2 billion
1925 to 1962 (37 years) 3 billion
1962 to 1975 (13 years) 4 billion
1975 to 1987 (12 years) 5 billion
1987 to 1999 (12 years) 6 billion
1999 to 2012 (13 years) 7 billion
 
 
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