What substance is indicated by rolling papers, pipes, and the odor of burnt plant material?

The presence of rolling papers, pipes, and the distinct smell of burnt plant material is strongly indicative of cannabis use. Rolling papers are commonly associated with the practice of hand-rolling cigarettes or joints filled with cannabis. Additionally, pipes are another common method for consuming cannabis. When combustible plant material, such as cannabis, is burned, it produces a recognizable odor that can be a key indicator of its use.

In contrast, cocaine and heroin are typically either snorted in powdered form or injected, and they do not generate the same kind of physical paraphernalia or odor associated with plant material combustion. Alcohol, on the other hand, does not involve any of these methods of consumption and does not produce a similar odor tied to plant matter. Therefore, the combination of these specific items directly relates to the use and consumption of cannabis.