TABLE 4b.

Anthropogenic (man-made) Contribution to the "Greenhouse
Effect," expressed as % of Total (water vapor IGNORED)

  % of All Greenhouse Gases  % Natural

% Man-made
 Water vapor ------  ------   ------
 CO2 72.369%  70.035%  2.334% 
 Methane 7.199%  5.879%  1.320% 
 N2O 19.000%  18.063%  0.937% 
 Misc. gases 1.432%  0.491%  0.941% 
 Total 100.00%  94.47  5.53%