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Some e-liquids contain nicotine, and some are nicotine-free

"Safety evaluation and risk assessment of electronic cigarettes as tobacco cigarette substitutes: a systematic review"

Mycorrhizal fungal abundance is affected by long-term climatic manipulations in the field

[24] (Although monoecious plants are often referred to as "hermaphrodites", true hermaphrodites which are less common in Cannabis bear staminate and pistillate structures together on individual flowers, whereas monoecious plants bear male and female flowers at different locations on the same plant.) Subdioecy (the occurrence of monoecious individuals and dioecious individuals within the same population) is widespread