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Scientists at the University of Mississippi studied Cannabis sativa to determine suitable and efficient environmental conditions for indoor mass cultivation for pharmaceutical uses. Beside studies on the effect of light and temperature, they investigated the influence of CO2.

Cannabis sativa belongs to the so called C3 type of plants. Best climate conditions for growth are at moderate light and temperature regimes. Light above 1500 mmol/m2-sec photosynthetic photon flux densities and temperatures above 30°C inhibits growth. Doubling the atmospheric CO2 concentration, resulted in more tolerance towards dry and hot climate conditions. The yield could be increased  up to 30%.  


Nov 7th 2017

Mills (2012) made a calculation using data of an average growing method of american indoor growers from planting to selling. Even though the CO2 emission seems quite high, it is just one third of U.S. data centers and 1/7 of all refrigerators in private households. Anyways, it is definitely worth it, to look at the production method and try to find alternative cultivation systems for the future.

Oct 26th 2017

“There are biochemically distinct strains of Cannabis, but the sativa/indica distinction as commonly applied in the lay literature is total nonsense and an exercise in futility.”

Dr. Ethan Russo (

Many consumers describe the effect of Cannabis consumption either as a “High” or “Stoned” effect, depending on the impact of sativa or indica strains. Sativa, indica, ruderalis, afghanica strains are mainly describing the morphology of the plants. Without a biochemical profile, it is not possible to make any reliable recommendation on the effect of the different strains. This can be explained by the strong interbreeding/hybridisation practiced for centuries. Most of the Cannabis offered on the market derive from high-THC strains.

There is evidence, that the effect described as “High” or “Stoned” is influenced by terpenoids.


“Stoned” was found to be forced by the terpenoid myrcene and “High” attributed to the limonene content. In addition, the terpenoid alpha-pinene reduces the short-term memory impairment by THC.