The Keeling Curve tells us how much CO2 is in the air. It's about to break 400 parts per million. To put that in perspective, scroll down. The fourth one is the most eye-opening.
This is what it looked like over the last two years. See, it doesn't look so bad.
If we zoom out, it looks a little bit more intimidating. But still, we've had major shifts in climate change over the millennium.
Yes, that looks a little scarier, but seriously, 200,000 years ago the same thing happened. Here's a chart of the last 800,000 years.
Can you see the problem here? Share it if you can.