The studies reporting RRs of smoking and cancer published before August 1, 2012 were identified using databases including PubMed ( and KoreaMed ( The search keywords were Korea, Asia, smoking, tobacco smoking, passive smoking, secondhand smoke, environmental tobacco smoke, risk, and cancer
17 ALHarthi, S
Incapsula incident ID: 186000740013868101-34418837130187410
Desert Thunderstorm (Desert Sage, Pinyon Pine & Resin, Petrichor, Sweetgrass, Creosote Bush, Sand, Ponderosa Pine, Smoke) Richard Thomas explains that many natural dry clays and soils evolve a peculiarly characteristic odor when in contact with moisture, and notes that this odor is particularly prevalent in arid regions and widely associated with the first rains after a period of drought