Sentinel-5 Precursor is the first Copernicus mission dedicated to monitoring our atmosphere. With air pollution a major concern, this new satellite carries the state-of-the-art Tropomi instrument to map a multitude of trace gases such as nitrogen dioxide, ozone, formaldehyde, methane, carbon monoxide and aerosols – all of which affect the air we breathe and our climate. Data will be used for the Copernicus Atmosphere Monitoring Service, for monitoring air quality, for global emission inventories & for UV warnings. Data will also support volcanic ash monitoring services for aviation safety.