To determine past CO2 levels, scientists drilled 2 miles into Antarctic ice (they looked back 50,000 years.)

Ancient Atmospheric gases are trapped deep in ice bubbles, allowing researchers to study past CO2 levels.

“Studying the past teaches us how today is different. The rate of CO2 change today really is unprecedented,” Wendt stated. “Our research identified the fastest rates of past natural CO2 rise ever observed, and the rate occurring today, largely driven by human emissions, is 10 times higher.” -- Dr. Kathleen Wendt

CO2 Increase (parts per million per year)

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CO2 Rates Growing 10X Faster Than Last 50,000 years