Word: ammonia
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Dates: during 1970-1979
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...researchers from the Massachusetts Institute of Technology and the Lincoln Laboratory used a radio telescope to discover the hydroxyl radical (two-thirds of the water molecule) in space. Since then, more than three dozen molecules have been found floating in the galactic clouds, including those of methane, formaldehyde, ammonia, hydrogen cyanide, ethyl alcohol and carbon monoxide...
...years, OSHA has produced a grand total of three comprehensive health standards for industry: one governing the amount of asbestos that can be present in factory environments, another for carcinogens, a third for vinyl chloride. It has yet to specify limits and control procedures for such toxic substances as ammonia, sulfur dioxide, beryllium and lead-the last a known danger since the Middle Ages...
...mostly the tasty tropical tilapia (somewhat like the sunfish). Pumped by the windmill, the water from this pond is passed through a solar heater, then circulated through a bed of crushed, bacteria-laden shells in the topmost pond. The bacteria not only detoxify the fish wastes but convert the ammonia in them to nitrites and nitrates, which are used to fertilize algae in another part of the pond...
...data returned by the spacecraft also support the long-held theory that Jupiter is unique among planets: a great ball of whirling gases and liquids with no solid surface. Its outermost 600 miles consist of an atmosphere of hydrogen and helium gases laced with clouds composed of crystals of ammonia, ammonia hydrosulfide and water ice. The rest of the planet is mostly a seething cauldron of liquid hydrogen, except perhaps for a small, rocky, possibly iron-bearing core. Scientists suspect that Jupiter's extreme interior heat-about 54,000° F. at the core-may be left over from...
Woods Hole Marine Biologist John Ryther has devised an even more ingenious aqua-farming scheme using partially treated sewage water from the Cape Cod town of Wareham. In his ponds, Ryther raises a thick harvest of plankton, which is then fed to baby oysters. To remove whatever ammonia, phosphates or nitrates the oysters and plankton may have left behind, he runs the sewage water over beds of seaweed, which also thrives on these chemicals...