Find a NIOSH Pocket Guide to Chemical Hazards, look up Nicotine, C5 H4 N C4 H7 NCH3. You will see it is listed as " Physical Description: a Pale-yellow to dark-brown liquid with a fish-like odor when warm. [insecticide] " Nicotine is about three times more toxic than rattlesnake venom, just as toxic as aresnic, and illegal for use on food crops in the United States, just like DDT.
Legalize it, let individuals grow it for their own use.
A company that produces a marijuana should be taxed on that product at the rate a simular tobacco product is taxed. Keep it simple. We have too many laws now.
The war on drugs is not working because marijuana is illegal.
If an insecticide is ok for human use, marijuana is, too.
An Executive Order would do this.