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1 vote
Which is the most important thing you can do to protect your respiratory system? 1 limit smoking 2avoid respiratory infections 3 do not smoke 4 get regular exercise

User Bohm
by
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2 Answers

2 votes
get regular exercise
User SamSPICA
by
8.4k points
4 votes
get regular exercise

User Jens Neubauer
by
7.8k points
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