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...different study by Crutzen and three other scientists emphasizes the importance of the ozone layer. Researchers have been able to correlate the disappearance of certain species of animals and plants with periods when the earth's magnetic field was reversing. At some point during the reversal, the field virtually disappears, allowing solar particles that are normally deflected by the magnetic field to strike the earth. Some scientists have suggested that during these periods high-energy cosmic rays and particles from solar flares may have killed off entire species and caused extensive mutations in others...
...paper published in Nature, G.C. Reid and I.S.A. Isaksen of NOAA, T.E. Holzer of NCAR and Crutzen suggest that the solar particles may not directly wreak their havoc on life during magnetic field reversals. Instead, unobstructed by the field, they may deplete the ozone layer by as much as 50% by creating nitrogen oxides, letting in lethal doses of ultraviolet light...
That could explain the sudden disappearance throughout the earth's history of many animal and plant species, from the single-celled, ocean-dwelling radiolaria to the dinosaurs. Thus, Crutzen and his colleagues note, a long-term threat to the ozone layer from any source may well be a threat to the species that now inhabit the earth-including...
Public Verdict. Who is right in the nuclear debate? Or in the arguments over aerosol sprays and supersonic aircraft and their effects on the ozone layer? Or in the controversy surrounding food additives and cancer? Too often those who must ultimately decide these issues are likely to be swayed by rhetoric rather than by scientific fact because there is no easy way to sort out the facts in arguments between scientists. Physicist Arthur Kantrowitz, 62, thinks that he has a solution to the dilemma. Kantrowitz, head of Avco Everett Research Laboratory in Everett, Mass., and one of the key engineers...
Physicist Fred Sterzer, director of RCA's Microwave Technology Center at Princeton, N.J., points out that there are well-known and commonly used countermeasures. All the embassy need do, he says, is use metal Venetian blinds, place a layer of wire mesh under its floors, and paper its walls with metal foil, which can then be covered with regular wallpaper. These precautions would not only block any incoming microwaves, but would also prevent bugs in inside walls from sending signals outside the building by microwave...