The air quality in Greenland is among the best in the world due to it’s geographical position in the high north. Due to the low level of moisture in the air the line of sight is also increased a lot. From Aasiaat you can see the Disco Island which is located 70 kilometers away.
Another interesting fact about the dry air is that temperatures doesn’t affect you in the same way as you might be used to. Minus 10°C in Denmark would feel like 0°C in Greenland.