steadily rising...hasn't happened in the last 800,000 years...surely, you wouldn't post innuendos of mis-statements by Biden, if you didn't have rock solid evidence to the contrary...now, would you?
Is it pure coincidence that the rise started just when mankind started burning fossil fuels in earnest and injecting levels of CO2 that our natural ecosystem can't remove fast enough?....let's have your latest hypothesis on what's "really happening".