“Photosynthetic response of Cannabis sativa” … thank CO2

So much truth on climate change has been avoided by the Green left in their determination to rid the world of CO2, calling it pollution. Instead, they might want to look at the benefits, says Meteorologist Joe D’Aleo: Superbowl, Cannabis and CO2


The two surviving teams going to the superbowls coming from the two states that have legalized marijuana. I will avoid speculating a possible role of that in bringing that outcome, I will make the point that they can thank CO2 for increasing photosynthesis, limiting the transpiration and through that limiting the water usage needs for Cannibas.




A paper supported by the National Institute for Health (NIH) published in Physiol. Mol. Biol. Plants, 14(4) October, 2008, Photosynthetic response of Cannabis sativa L. to variations in photosynthetic photon flux densities, temperature and CO2 conditions by Suman Chandra, Hemant Lata, Ikhlas A. Khan and Mahmoud A. Elsohly tells us the story. From the abstract we see:


Effect of different photosynthetic photon flux densities (0, 500, 1000, 1500 and 2000 μmol m-2s-1), temperatures (20, 25, 30, 35 and 40 degrees C) and CO2 concentrations (250, 350, 450, 550, 650 and 750 μmol mol-1) on gas and water vapour exchange characteristics of Cannabis sativa L. were studied to determine the suitable and efficient environmental conditions for its indoor mass cultivation for pharmaceutical uses.




An average of 30 to 33 % increase in PN and productivity of C3 plants with doubling atmospheric CO2 concentration has been already reported by Kimball 1983a, b; 1986; Idso and Idso 1994; Bazzaz and Gabutt, 1988; Cure and Acock, 1986. In Cannibas sativa, a doubling of CO2 concentration (750 μmol mol-1) suppressed E 29 % stimulated PN by 50% as compared to ambient CO2 concentration. Doubling CO2 level had a significant effect on all these parameters.


We may gain more converts into the battle against the cabonistas if we educate the public in these blue green states on this fact!!!!




Puts a new light on Arte Johnson’s character from Laugh-In. Very interesting.


About Tom Harley

Amateur ecologist and horticulturalist and CEO of Kimberley Environmental Horticulture Inc. (Tom Harley)
This entry was posted in Climate, comedy, Environment, Health, Resources, science, weather and tagged , , , , , , , , . Bookmark the permalink.

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