How a giant air freshener could save our polluted cities

Air pollution kills 28,000 people every year in the UK. But the solution might lie in a hi-tech tower that sucks up harmful particlesHigh in the skies over London, the UK's first air pollution monitoring squad have been using the latest sensors to chart the levels of ozone and nitrogen dioxide in our atmosphere. The team is highly trained, each equipped with a hi-tech backpack, and proficient in social media. Which all sounds relatively standard, apart from the fact that it is entirely made up of pigeons.Using one of the UK's best-known feathered friends as a publicity stunt for air pollution awareness was the brainchild of Plume Labs, which has created an app for monitoring pollution on the go. It follows on the heels of similar apps released in the past two years, ranging from UCLA's AirForU to BreezoMeter, the brainchild of Israeli engineer Ran Korber, who was looking to buy a house for his family far away from polluted environments. Continue reading...