Not quite. PE, not APE. APE is a low yielder. Regular PE yields better. Yeah, they definitely produce Co2. Not sure how much, but I'm sure 75 bags are doing something. I personally believe (with our background in Mycology) that these faster growing species of fungi will produce more CO2 than those shitty "exhale"bags. The CO2 production may not last as long, but I believe they will put off higher ppms for a shorter time. The blending of two loves, lol.