You got it backwards. Because of the greenhouse effect, greenhouses have to be well ventilated.
"You got it backwards. Because of the greenhouse effect, greenhouses have to be well ventilated."
Hmm our atmospheric dynamics professor told us that the CO2 concentrations in a green house were not nearly high enough to explain the temperature rise in green houses - that most of the warmth in a greenhouse comes from eliminating the convection that acounts for most heat exchange at ground level. I have not personally studied the numbers.