State oil company Pemex drilled dozens of new wells and built a system to inject nitrogen gas.
Too much oxygen and the toxic ammonia in waste won't convert to nitrogen gas, which bubbles out.
Then anaerobic bacteria take that nitrate and turn it into harmless nitrogen gas.
These creatures, now called anammox bacteria, transform caustic and hazardous ammonium into dinitrogen, the harmless nitrogen gas that makes up 78% of the air we breathe.
Before leaving the Bell Rocket Belt, it's worth noting that Mr. Li's essential innovation powering a jetpack by way of a pressurized umbilicus is exactly how Bell engineer Wendell Moore tested his first prototype in the late 1950s, except Mr. Moore used nitrogen gas instead of water.
The most abundant gas is nitrogen, at 78%, followed by oxygen at 21%.
Unlike helium, which is extracted from natural gas, nitrogen can be readily harvested from the air, and cooled for a fraction of the price.
The manufacturing process for these devices results in the release of a gas called nitrogen trifluoride, or NF3, which does approximately 17, 000 times more environmental damage than carbon dioxide.
In LCDs silane gas breaks down into a film of silicon that forms the transistors that stimulate the pixels in the screen. (Flat-panel screens are essentially large semiconductor devices that sit on pieces of glass rather than on silicon wafers.) Another gas, nitrogen trifluoride, cleans the chambers in which both chips and LCDs are made.
Energy accounts for about three-quarters of the cost of producing nitrogen fertilisers, so cheaper gas and proximity to America's many farmers make Terra an attractive buy.
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The 600-megawatt Indiana plant will convert coal into turbine-ready gas while stripping out pollutants nitrogen and sulfur.
Nitrogen tetroxide is a reddish-brown gas at room temperature and has a "pungent, sweetish" smell, according to experts.
Nitrogen is separated from oxygen before combustion, thereby reducing the volume of exhaust gas and making the exhaust easier to treat by preventing the formation of polluting nitrogen oxides.
Burning diesel versus gas results in higher levels of nitrogen compounds and soot, both of which can be very harmful to human health.
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The largest problem is the dangerous amount of nitrogen oxide (which mixes with vehicle-exhaust gas to create ozone, and then smog) coughed out by the state's industrial plants.
Today's diesel and natural gas engines emit similar amounts of sulfur, nitrogen and particulates, he said.
But the traffic increase has slowed progress in reducing emissions further, and people in many areas still suffer from nitrogen-related air pollution, including small particulates that get sucked deep into the lungs, and ground-level ozone - a strongly irritant gas formed by the action of sunlight on reactive nitrogen.
For important pollutants monitored by the EPA, natural gas power cuts carbon monoxide emissions by 81%, nitrogen oxide emissions by 80%, sulfur dioxide emissions by 99%, mercury emissions by 100%, and particulates by 99%.
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Power plants that burn coal produce more than 90 times as much sulfur dioxide, five times as much nitrogen oxide and twice as much carbon dioxide as those that run on natural gas, according to the Government Accountability Office, the regulatory arm of Congress.
Natural gas power emits merely 20% of the carbon monoxide of coal power, 20% of the nitrogen oxides of coal power, less than 1% of the sulfur dioxide of coal power, less than 1% of the particulate matter of coal power and less than 1% of the mercury of coal power.
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