They are available upon request for specific formulation, but however some are available over the counter
"It hath an upright stalke, not bending any way, thicke, bearded or hairy, and slimy: the leaves are broad and long, greene, drawing somewhat towards a yellow, bearded or hoarrie, but smooth and slimie, having as it were talons, but not either notched or cut in the edges, a great deale bigger downward toward the root than above: while it is young it is leaved, as it were lying upon the ground, but rising to a stalke and growing further, it ceaseth to have such a number of leaves below, and putteth forth branches from half foot to half, and storeth itselfe, by that meanes with leaves, and still riseth higher from the height of four or five foote, unto three or four or five cubits according as is sown in a hot and fat ground, and carefully tilled
The irony of this project is that, although its probably fairly easy to train crows to recognize cigarette butts, the implementation hinges on having a vision system that can recognize the butts in order to properly train the crows in the first place
Sex in the 90s (much like the lamentably forgotten MTV series that bore that name) was about self-education
CSE and EVE Effects on Barrier Integrity and DNA Damage Exposure to CSE had profound effects on epithelial barrier integrity
