is it bad to smoke old cigarettes Poll: U.S. Smoking Rate Falls Historic Low [Infographic] What Happens to Your Body,

CADRs from commercial air cleaners can also vary from the manufacturers claims

'Why smoking impairs the ability to learn about safety is not clear, but one possibility is that smoking changes neurotransmitter balances in the brain, which are necessary for successful safety learning.' Dr Haaker and his colleagues now hope to unravel the mechanism underlying this effect with the hope of developing new treatments and perhaps even new drugs

Nat Med 9:352355 Soga T, Kamohara M, Takasaki J, Matsumoto S, Saito T, Ohishi T et al (2003) Molecular identification of nicotinic acid receptor

BTW, heres what it means when a Disney employee has a blue name tag