Summarize this article in one sentence.
Marijuana has a distinctive odor that may be musky or skunk-like, and often slightly sweet. This smell may linger on a marijuana user's clothing, breath, skin, or hair. You might also notice it in a room where they smoke or store their smoking implements. Someone using marijuana may try to hide the scent by wearing perfume or cologne, using breath mints, or using incense or air fresheners in the room(s) where they smoke. Marijuana can be consumed in a variety of different ways. Look around for any of the following types of implements:  Rolling papers or blunt wraps Pipes (often made of glass) Bongs (or water pipes) Vape pens Grinders Long-term marijuana use can lead to a variety of mental and behavioral changes. A marijuana user may experience a loss of energy and motivation. Depression, anxiety, and other mental health issues may get worse or appear for the first time. Marijuana use can also affect interpersonal relationships and school or work performance. You might also notice:  A lack of interest in things the person used to enjoy. A change in habits relating to money. For example, the person may frequently ask for money, start stealing money, or go through money rapidly without being able to explain where it is going. Evasive behavior (e.g., acting like they are trying to hide something, or not giving straightforward answers to questions about what they're doing).

Summary:
Check for the smell of marijuana. Look for items related to marijuana use. Watch for changes in behavior and relationships.