For generations, people have used plant smoke in cleansing rituals, and now science is beginning to study what smoke can actually do in the air. One study found that smoke from a specific mixture of medicinal plants reduced airborne bacteria in a confined space by 94%. That does not prove every sage-burning ritual works the same way, but it does show that traditional practices can sometimes point toward real biological effects worth studying. Still, smoke is smoke. Burning herbs indoors can create fine particles that may bother the lungs, especially for people with asthma, allergies, or breathing problems. The truth is more powerful when it is accurate: some medicinal smoke practices may have measurable effects, but they should be understood carefully, respectfully, and safely.