The Valley of the Sun mostly sparkles year-round with endless blue skies, but around the holidays the dreaded “brown cloud” returns year after year threatening to spoil our views and our health. First Alert Meteorologist Sean McLaughlin goes in-depth with a communications specialist from Maricopa County’s Air Quality department to break down the reasons behind our dirty air. From our topography and winter weather patterns to that cozy, backyard fire pit and a few fireworks combined, can almost instantly pollute your own neighborhood’s air quality to dangerous levels.