Smoke is always harmful for ones lungs (campfire, cigarette, fumes, housefire... always.)
I don't know about the other two... but pixie dust makes you fly; angel dust makes you think you can fly.
I don't know about the other two... but pixie dust makes you fly; angel dust makes you think you can fly.

Please give me a home where cloud buffalo roam
Where the dear and the strangers can play
Where sometimes is heard a discouraging word
But the skies are not stormy all day