"NOAA: Time history of atmospheric CO2"
The National Oceanic and Atmospheric Administration (NOAA) has an entire “CarbonTracker” page “to keep track of carbon dioxide uptake and release at the Earth’s surface over time.”
Their CarbonTracker Channel on YouTube has some great videos. The best one is the “Time history of atmospheric CO2,” which charts the rise of CO2 over the last few decades then back through the past 800,000 years:
Watch this in full screen HD if you can.