CO2 and Temperature Fluctuations During the Past 800,000 Years

Two graphs share the x-axis labeled Years before present. A graph of carbon dioxide in parts per million and temperature difference from 1,000-year average temperature in degrees Celsius over the past 800,000 years. The data show a correlation between carbon dioxide and temperature difference.
Carbon dioxide (ppm) and temperature difference from 1,000-year average (°C) over the past 800,000 years