How Pigeons Are Keeping Track Of London's Air Pollution Problem
Ten pigeons wearing special high-tech backpacks were set free in London to track pollution levels at spots in the city.By Ben Lawson | March 15, 2016
Pigeons are monitoring the air quality in London. Yes, pigeons.
Ten of the birds, dubbed the Pigeon Air Patrol, were equipped with tiny pollution-detecting backpacks.
And those backpacks check for nitrogen dioxide created by diesel cars, buses and trucks.