Which of the following best describes the relationship between atmospheric
CO2 levels and global temperature
1. CO2 and global temperature have
fluctuated over the past 800,000 years,
with periods of high CO2 correlating with
higher global temperature
2. Both CO2 and global temperature have
stayed relatively stable over the past
800,000 years
3. There has been fluctuation in both CO2 and
global temperature over the past 800.000. 4. CO2 and global temperature has fluctuated over the past 800,000 years, with periods of high CO2 correlating with lower global temperature