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If youve got a connecting flight to make, its important to note that some countries will not let you carry the duty-free purchases through to your next flight unless they go in your hold luggage - so it's worth checking the rules at your destination before you splash out on a big purchase

There are portable air cleaners that can capture both particles and gases (but these get expensive)

By the way, Silver and Ursini's book is slow going

Thirdhand smoke can't be eliminated by airing out rooms, opening windows, using fans or air conditioners, or confining smoking to only certain areas of a home." Learn more

Support groups: Connecting with others who are quitting can provide motivation and shared strategies