There has been much debate as to whether or not ethylene promotes feminization. Many member of this site are intrigued by the idea, but not overly convinced, on account of the lack of evidence.
WELL I HAVE THE EVIDENCE.
I'll cut to the chase, their have been scientific experiments and tests performed to prove that ethylene promotes feminization in cucumbers (No studies were done on marijuana, yet I feel the theory must stand true for both). Results were conclusive and the test proved that ethylene gas...
(direct quote from website) "The data suggest that ethylene participates in the regulation of sex expression by promoting femaleness."
THIS IS THE WEBSITE =
Ethylene Evolution from Cucumber Plants as Related to Sex Expression -- Rudich et al. 49 (6): 998 -- PLANT PHYSIOLOGY