one thing to keep in mind is the alkaloids(drugs) in plants are designed to harm the insects that eat it(or the insects eat teh plant then the spiders eat them). a defence mechanism. and it appears that the most effective natural one is caffiene. that i find interesting. not marijuana or peyote/mescaline.
not surprising but interesting none the less
Only when the last tree has died, and the last river poisioned,
and the last fish caught
will we relize we cannot eat money.