CO2 levels

I have pointed out many times that the CO2 levels have been increasing at an accelerated rate in recent years and this coincides with the industrial revolution and that leads one to belief that there is a correlation. This has been challenged by Covid. Core ice samples going back 2.7 million years show CO2 levels stayed below 300 ppm. In 1900 the level crossed the 300 ppm line and reached 400 ppm in 2015. The problem is that the levels continued to rise during the pandemic. This occurred in spite of the fact that man made emission decreased by 7% but the CO 2 continued to rise. This is a challenge to the aforementioned correlation. This is disturbing to me because I assumed that burning fossil fuels was the cause of the rise over the past 120 years. I now must reconsider this hypothesis. A predicted drop did occur during the 1973 oil embargo but not this time.