What is the 'acceptable' CO2 level in the atmosphere?

Three Berries

Well-Known Member
400 isnt too much..Whered you see that? That's avg.
Yes I know. I believe the get the average from the top of a mountain in Hawaii. I've had a CO2 monitor for years. And the average during summer waxes and wanes as the sun rise and the plants start working. Morning about an hour after dawn was the highest and 4-5 pm or so was the lowest. 350-650 every day as long as it wasn't windy.

But I just got throw out of a thread for questioning the settle science of what should the CO2 level be and wanted to know.

 

J232

Well-Known Member
400ppm is the calibration point for most monitors, it doesn’t matter where you are, you calibrate it outdoors. How much would depend on the environment, light.. 4-1400ppm?
 

Three Berries

Well-Known Member
Yes I know what it usually is and what is normal. I have had an indoor CO2 meter for 10 years. I got a new one and it is self calibrating and a POS because it always sees an elevated level in the house so self calibrates and adjust the 400ppm to that. I end up with slowly dropping CO2 read out. It can be manually calibrated but the CO2 level needs to be near the 400ppm level. But sits unused. :( It does data log though.

But the, the Climate Change advocates want to reduce the CO2 or stop it from rising. What is the settled science on what that number is? I heat my house normally with an unvented propane heater. At times I may see over 4kppm in the house. Very rare and it is then when a fresh air booster fan comes on.
 

Three Berries

Well-Known Member
oh what is this your seqway into your real intention of this conversation?
I was locked out of a thread for asking this question. >>> At what CO2 level is acceptable?

Was curtly told the science is settled. Well it's not. If it was it would be a common consensus, instead appears to be nothing definite.
 
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