Talk about a bird-brained idea : for a few day in london a flock of 10 pigeons flew around town track air pollution know as the pigeons air patrol braid were outfitted with tiny backpack containing a señor measuring harmful emission in the air. As the pigeons took to the skies people could monitor their progress-and pollution levels around the city- online . The pigeon air patrol was just an experiment in london but as air pollution continues to plague the planet this approach could really take fight around the world .
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