This approach is based on recommendations that environmental exposure be considered at multiple locations [72], previous work combining home, school, and daily transport environments [73], and research suggesting that the ideal size of an activity space for adults is an 800 m to 1 km road network buffer [74]
[1] In physics, a vapor is a substance in the gas phase whereas an aerosol is a suspension of tiny particles of liquid, solid or both within a gas
consider how to regulate e-cigarettes and new heat not burn cigarette products
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