How much carbon dioxide is needed to increase the concentration of carbon dioxide in greenhouse from 800PPM to 1200PPM? The volume of greenhouse is 1 1000 cubic meters.

Landlord, there are two unclear points about your question. I can't give you a specific answer, but I can only talk about my thoughts. Thank you.

First, the air parameters, pressure and temperature in the greenhouse are unknown; Second, the parameters of carbon dioxide gas charged into the greenhouse are unknown.

For this kind of greenhouse gas, ppm unit represents the proportion of carbon dioxide in the total volume of greenhouse gas, and 1ppm is one in a million, so if it is increased from 800ppm to 1200ppm, the volume fraction will increase by 400ppm, that is, 0.04%, which is 44 cubes. Then convert the 44 cubes under the greenhouse parameters into the volume under the carbon dioxide parameters to be charged, and you will get your answer.

I hope my answer can help you, thank you ~