Where is some of the cleanest air you could ever breathe? Svalbard. It's a Norwegian island archipelago in the Arctic complete with polar bears and frozen tundra. Last October, Anna Filipova, an environmental photographer who resides in Paris, explored Svalbard— one of the northernmost inhabited regions in the world, where atmospheric research is conducted. According to her interview with CNN, sensors are so sensitive that breathing near them will actually alter their read