Polution as harmful as chain smoking

Persistent free radicals have been detected in the air in ammounts that are very dangerous. So far it was believed that free radicals in the air were soon transformed in other more stable and less harmful materials but a new study reveals that many of them actually persist for long, reaching our body systematically. The result is that everybody seems to be "smoking" all the time as we breath:

In the five minutes it takes a typical smoker to finish a cigarette, he or she will breathe in an equal number of PFRs from the air and the smoke itself.