It’s claimed that the cleanest atmosphere is to be found on the Norwegian island Svalbard, which makes it a perfect location for astronomical, meteorological or climate research. Svalbard is located between North Pole and Greenland. Svalbard has historically been a base for both whaling and fishing, but now the main industries are tourism, coal mining and of course research.
Even NASA has a research station on Svalbard. The whole landscape in Svalbard is marked with different kinds of measuring technological equipment