Word: nitrogenous
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...ruling from David E. Fierra, deputy commissioner of the Department of Environmental Quality Engineering, states a new Harvard plan for the facility does not prove its contribution to nitrogen dioxide levels in certain "hot spots" will be insignificant...
Doctors pumped mixtures of helium, nitrogen, and oxygen into the chamber to simulate various ocean depths. The dive originally had been planned for only 1500 feet but after a successful air misture was found using helium, to replace nitrogen, the divers and doctors agreed to try to surpass the previous depth record of 2001 feet, set in 1972 by a French diving team...
Acid precipitation is apparently caused largely by sulfur dioxide emissions from coal-burning power plants, smelters and factories. To a lesser extent, nitrogen oxides from car exhausts and industry contribute to the problem. Rising high into the sky and borne hundreds of miles by winds, these chemicals mix and react with water vapor to form sulfuric and nitric acids. The acids then fall to earth in the form of rain or snow that can damage anything from monuments to living organisms. After a number of such rain showers or highly acidic snow melts, a lake's pH* can plunge...
...concentrated in sediment, changes into an organic form, methyl mercury, in acid water and is then easily absorbed by the fish. While the threat to plants is not as well understood, acid rain can eat away at leaves, leach nutrients from the soil, interfere with photosynthesis, and affect the nitrogen-fixing capabilities of such plants as peas and soybeans. Scandinavian scientists claim the rain has caused a 15% reduction in timber growth. It can also corrode stone statues, limestone buildings and metal rooftops. In the past two decades, Athens' Parthenon and Rome's Colosseum have deteriorated severely...
Under the Harvard proposal, the power plant's diesel engines would have to be throttled back if the plant's nitrogen dioxide emissions exceed 320 micrograms per cubic meter--the safety level which Fierra established in his decision...