wow... I don't even know what to say about what I am reading...
First off, just from a pure scientific standpoint, the only way you can make a statement based on quality, yield, or anything, is to first establish a control. After that, to test for instance, Co2, you must only manipulate that one variable, while leaving everything else exactly the same in your control test, to compare the two.
Just from the standpoint from where I am sitting, I can see science being blatantly ignored. Instead, I see people making blanket statements they have no true understanding of.
Even a link to an article, or an inference to a book would be a start, but literally shit is just being pulled out of people's asses. Let's all take a step back here, and post facts only, for all of our benefit.