Pigeons measure air pollution in London

london - In the British capital London, one of the most polluted air in the world, since this week are pigeons used to measure nitrogen dioxide in the air, CNN reports. Ten trained pigeons flying around now with a sensor of 25 grams to measure hazardous gas in each district.

According to a report about 9500 people last year of King's College London University, die each year in the British capital as a result of prolonged exposure to the polluted London air.

The Pigeon Air Control is part of Plume Labs, a technology company focused on solutions for air pollution. British head townspeople can via Twitter to the doves ask how their neighborhood is sure to air pollution.