DePaul Techniques to Measure Pre Industrial Level of CO2 & Temperature Questions Many scientific advances have been made towards accurately collecting evid

DePaul Techniques to Measure Pre Industrial Level of CO2 & Temperature Questions Many scientific advances have been made towards accurately collecting evidence for global climate change. Explain one technique used: (1) to measure changes that have occurred in atmospheric CO2 over the past 500,000 years; and (2) to measure the long-past temperatures over this same period of time.