HUGE JUMP IN CO2 LEVELS
FROM 1.5ppm/yr AVERAGE INCREASE TO 2.54ppm/yr
Atmospheric CO2 levels derived from
measurements in ice cores (Etheridge and Wookey 1989, Etheridge et al. 1996,
1998, Morgan et al. 1997) and direct measurement from Mauna Loa (Keeling and
Whorf 2002)