When smoke floats in, it scatters the light, and the sensor picks up on that shift
It uses a three-filter system, including a MERV-16 particle filter and activated carbon, and it really impressed me with how quickly it stripped smoke and odors from the air
For a more dramatic smoke effect, some gardeners practice coppicing, cutting the plant back hard each year to encourage vigorous new growth and larger leaves, though this may reduce flowering
[DOI] [PubMed] [Google Scholar] 42.Gerasimov MR, Franceschi M, Volkow ND, Rice O, Schiffer WK, Dewey SL
Instead, Robson would like the London force to enact a "fit-for-service" model the force currently uses for other legal substances, everything from alcohol to prescription medication