Note: This is the 1997 edition of UNEP's Global Environment Outlook
. If you are interested in more recent information, please see the 2000
Figure 4.3. Recent and projected trends
in population growth.
- Alcamo et al. (1994); Berry (1990); UN (1992); WRI/UNEP/UNDP (1986,
1992, 1994); Klein Goldewijk and Battjes (1995).
- One billion represents 109 or one thousand million.