518 
FIGURE 2 
(IEB, 1989) 
WORLD’S C0 2 EMISSIONS, 
Normalized to 1950 
Rate of Increase (percent) 
1000 
800 
600 
400 
200 
0 
Source 
All other 
H North America 
1950 
1965 1980 
Year 
2000 
FIGURE 3 
(IEB, 1989)