CO2 readings at ground level and commentary

I went around the area (south of Rochester NY) with a handheld CO2 meter, and I found the readings fairly consistent with what we are told. That does not include the whole story. I explain where we get our oxygen (as it's winter). I would expect the readings in spring to be lower because the plants will be processing more CO2. I also include commentary about the atmosphere and its ability to trap heat.