Even when a meteor doesn’t hit the ground, its dust spreads all around the globe
Maybe one day a meteor will desintegrate in the atmosphere, but spread Fairy Dust all around. Or poison. Or worse? Here is a video showing how Chelyabinsk’s fireball spread all around the globe…
http://www.sen.com/news/dust-from-chelyabinsk-fireball-spread-round-globe.html