The Times of London reports today that Stockholm scientists have found those living over a 30-year period in areas with the heaviest traffic pollution have a 40 percent higher risk of developing lung cancer. Those who lived in areas of heavy traffic for only 10 years were shown to be 20 percent more likely to develop the lung disease. The effect was the same for smokers and non-smokers and for people from different economic circumstances. However, those in areas with light traffic pollution did not show an increased risk of lung cancer. Other researchers point out that Stockholm has relatively light traffic compared to other major world cities.
Lung cancer kills more people worldwide than any other cancer.
There's nothing left in the world to prove. All that's worth doing is to love one another, using any means available to that purpose.