Word: nitrogenating
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...fundamental tenet of atmospheric chemistry is that ozone depletion is controlled by nitrogen oxide radicals and the hydrogen oxide and halogen radicals play a much smaller part," Anderson says. "We have experimentally shown that in the lower ozone layer, the hydrogen oxide radicals are on top and the halogen radicals are dominant. The nitrogen oxide radicals play the smallest role at less than 20 percent...
...engine exhaust deposits nitrogen oxides into the atmosphere, where they can chemically react with and deplete ozone...
Supersonic aircraft, which currently include the Concorde and some military planes, produce these nitrogen radicals in their engines. "Estimates show that a 50 percent increase in nitrogen radicals [in the lower ozone layer] is expected from a fleet of supersonic aircraft," Wennberg says...
Husband and wives who have been through in-vitro fertilization with some embryos left over have had to wrestle with the fact that they have a potential human being stored on ice. There are already 10,000 frozen embryos floating around in liquid-nitrogen baths in the U.S., stuck in a kind of icy limbo as their would-be parents sort out the options. Do they let the embryos thaw out and die? Do they give them away? Do they have the right to sell embryos to the highest bidder? And who gets custody -- or the cash -- in a divorce...
Harvard chemists have come up with a substance that in theory should be harder than diamond, considered the hardest substance on earth. The new synthetic material is a blend of carbon and nitrogen (diamond is all carbon), and if the researchers can make a chunk big enough and pure enough to test, they'll be able to see whether the theory is correct...