A team of sensor-equipped pigeons has taken to the skies over London in order to monitor the capital’s notoriously high pollution levels. Pigeon Air Patrol, as the project is known, was created by Plume Labs, a startup currently crowdfunding the Plume sensor, a personal air quality monitor that can tell the user what levels of pollution they’re being exposed to. The birds in the Pigeon Air Patrol carry a similar device in a small and lightweight ‘backpack’,…