1 billion in 1800
2 billion in 1930 (130 years)
3 billion in 1960 (30 years)
4 billion in 1974 (14 years)
5 billion in 1987 (13 years)
6 billion in 1999 (12 years)

news.nationalgeographic.com/news/2001/04/0417_wlpopulation.html

Do not underestimate the problem of human overpopulation

cybercentre.greenpeace.org//1019160456/1019222545/1019224932/1019239249/1019535610/1019616660/1019623469/1019659334/1019702771

Exploding Population is the No1 Threat to Mankind and the Earth

cybercentre.greenpeace.org/1014315852/index_html

We have 50 years to get off the planet


www.wwf.org.uk/News/n_0000000602.asp

act.greenpeace.org/1026466907/index_html

act.greenpeace.org//1038318903/103841309...