Pete, Struan, thanks for this most informative discussion! Seems we will never l ook at some lenses the same as before. As you say, there is probably not much to worry if simple precautions ar e taken. But we live in an environment that exposes us to cummulate small risks, radio-activity being just one of them with the remnants of Tchernobyl, but then there is the electro-magnetism and other bad rays from the computer screen, the diluted poisons in food additives, the mercury in tooth cement, the space and UV rays fr om the damaged ozon layer, the pollution in the air and water, the pesticides in the veggies and fruits, and fo r some, the white and deadly volutes of tobacco smoke just to name a few...
I better stop here this depressing list. The man of the future will have to be a transgenic creature blended with some cockroaches genes in order to survive, or will simply not be :-(
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