Sentences with phrase «of oxides of nitrogen»

State Agencies Must Purchase or Lease Vehicles That Use Alternative Fuels Louisiana's Advanced Biofuel Industry Development Initiative further states, «The commissioner of administration shall not purchase or lease any motor vehicle for use by any state agency unless that vehicle is capable of and equipped for using an alternative fuel that results in lower emissions of oxides of nitrogen, volatile organic compounds, carbon monoxide, or particulates or any combination thereof that meet or exceed federal Clean Air Act standards.»

NOx is a term for the arithmetic sum of oxides of nitrogen (principally NO and NO2) per U.S. federal emissions regulations.

Its revolutionary catalytic converter reduces emissions of oxides of nitrogen (NOx) to match those of a petrol engine.

In the mid-1980s, the company teamed up with another, Lean Burn Associates, to add a second component: a system which recirculates some exhaust gases into the air intake, which reduces emissions of oxides of nitrogen.

Not exact matches

As the world began to learn in September, when the U.S. Environmental Protection Agency issued a shocking «notice of violation,» the vehicles met emissions standards for dangerous oxides of nitrogen, known collectively as NOx, only when running their paces in an artificial, indoor lab setting.

Air pollutants are the result of impurities in coal that, once burned, can become air - or water - borne hazards, including soot, sulfur dioxide, nitrogen oxides, and mercury, all of which are regulated in the U.S..

It is almost three years since VW was caught fitting cheat devices to fool testers into measuring lower than actual levels of nitrogen oxides emitting from its diesel cars.

Some of the nitrogen the crops do not absorb is converted into nitrous oxide, a greenhouse gas 310 times more powerful than carbon dioxide.

While U.S. power plants have limits on other air - born pollutants — like nitrogen and sulfur oxides that cause acid rain — there haven't been limits, until now, on the levels of carbon dioxide emissions that power plants can emit.

POLLUTION CONTROLS - The biggest challenge for automakers is controlling emissions of nitrogen oxides, or NOX.

German engineering giant announces new technology it claims will cut nitrogen oxide emissions for diesel cars to a fraction of 2020 limits

... A number of scientific studies indicate that most global warming in recent decades is due to the great concentration of greenhouse gases (carbon dioxide, methane, nitrogen oxides and others) released mainly as a result of human activity... Doomsday predictions can no longer be met with irony or disdain.

In addition to carbon dioxide there are other disruptive products from the use of fossil fuels such as the nitrogen oxides that have already been referred to.

This is a matter of much concern as nitrogen oxides are greenhouse gases.

Automobiles, power plants and industries release oxides of nitrogen into the atmosphere.

In the United States the quantity of nitrogen oxides released in this way doubled between 1950 and 1973 (Postel 1987).

For vegetable products, energy use often is the dominant contribution of carbon dioxide emissions, but nitrous oxide emissions related to nitrogen application and fabrication also may be significant.

Emissions of nitrous oxide may be calculated if the nitrogen fertilizer or manure use during farming is known.

«Garden equipment engines emit high levels of carbon monoxide, volatile organic compounds and nitrogen oxides, producing up to 5 % of the nation's air pollution and a good deal more in many metropolitan areas like Los Angeles.

* 212 pounds of hydrocarbons (smog ingredient) * 1.7 pounds of nitrogen oxides (smog ingredient) * 5.6 pounds of irritating particles * 1,724 pounds of carbon dioxide

The EU National Emission Ceilings Directive sets ceilings for each Member State for emissions of ammonia, oxides of nitrogen, sulphur dioxide and volatile organic compounds (VOCs).

Emissions of nitrogen oxides have fallen by 62 per cent between 1990 and 2010, and fell by 3 per cent between 2009 and 2010.

It has also reduced 90 percent of harmful pollutants such as mercury, sulfur dioxide, nitrogen oxide, ozone and particulate matter.

«To ask the Secretary of State for Transport whether he has requested a derogation from EU air quality legislation in relation to limits on the levels of pollution from (a) nitrogen dioxide, (b) ozone and (c) other nitrogen oxides.

Soon after the delay to the decision was announced by Hoon last Christmas, the Miliband and Benn camps both contacted the Institute for Public Policy Research, over a pamphlet by Simon Retallack, the IPPR's head of climate change, arguing that the third runway should not go ahead unless the government required aircraft using it to meet the aviation industry's own targets to cut carbon dioxide emissions and noise in new aircraft by 50 % and nitrogen oxides by 80 % by 2020.

The United States released 6,511 million metric tons of CO2 equivalent in 2016 when CO2, methane, nitrogen oxides and fluorinated gases are added together.

The Golden State is at the vanguard in the United States in reducing auto emissions of nitrogen oxide gases, which help produce toxic smog and acid rain.

A more specific definition and stricter implementation of statutory limits for rapid increases of nitrogen oxides are potentially needed to address this issue and to close this gap regarding the risk of MI.»

The paper states: «Even though the ambient air in the city of Jena is comparably clean, the significant association between rapid changes in nitrogen oxides and onset of myocardial infarction (MI) suggests that the current EU statutory limits do not sufficiently protect against effects relating to the cardiovascular health of the population.

The proportion of diesel vehicles registered in Leipzig however rose from 19 to 26 % between 2010 and 2016 — with negative consequences: While black carbon and the number concentration of ultrafine particles decreased, the concentration of gaseous nitrogen oxides (NOx) is stagnant and is still too high.

View a slide show of the world's first carbon capture and storage facility in operation The small stream of flue gas travels to the carbon - capture unit through plastic pipes reinforced with fiberglass and is cooled to between — 1 and 21 degrees Celsius from the 55 - degree C temperature at which it emerges from the other environmental technology add - ons that strip out the fly ash, sulfur dioxide and nitrogen oxides.

Many power plants already employ such ammonia in selective catalytic reduction units to strip nitrogen oxides out of the flue gas.

In a paper released for discussion in the journal Atmospheric Chemistry and Physics, Crutzen calculated that 3 to 5 percent of the nitrogen in the fertilizers used to raise crops for biofuels could end up in the atmosphere as nitrous oxide, a potent, long - lived greenhouse gas.

Meanwhile, existing coal - fired power plants, many of which date to the 1970s or earlier, will continue to face pressure to close as other environmental regulations target conventional coal pollutants like nitrogen oxides, mercury and particulate matter.

South of East St. Louis, the industrial plants in Sauget release hundreds of tons of volatile organic matter, sulfur dioxide and nitrogen oxides each year.

The ConocoPhillips Wood River refinery also released nearly 5,000 tons of sulfur dioxide, 4,000 tons of nitrogen oxides and 2,000 tons of volatile organic matter, according to data from the U.S. Environmental Protection Agency.

The air control system offers a low - cost method to control and lower the production of nitrogen oxides and helps legacy engines meet compliance with EPA 2011 regulations.

«Particulates, ozone, oxides of nitrogen and sulfur — they all have strong biological mechanisms for making asthma worse,» said Dr. Rob McConnell, an asthma researcher at the University of Southern California.

It then combines with pollutants from combustion — mainly nitrogen oxides and sulfates from vehicles, power plants and industrial processes — to create tiny solid particles, or aerosols, no more than 2.5 micrometers across, about 1/30 the width of a human hair.

Scientists estimate that one - third of the world's acid rain falls near the coasts, carrying some 100 million tons of nitrogen oxide, ammonia, and sulfur dioxide into the ocean each year.

Fuel from the polluted site released more nitrogen oxides, which contribute to the formation of smog and ozone.

As shown in previous studies, the litter from the polluted site, which had endured high levels of atmospheric nitrogen oxides and ozone, had higher nitrogen content than litter from the clean site.

This reduces the levels of nitrogen oxides produced during combustion in the engine.

It also emitted 33,400 tons of sulfur dioxide and nitrogen oxides, which are linked to asthma attacks and other respiratory problems.

The pollution is generally a mixture of gases — such as carbon monoxide, sulfur dioxide and nitrogen oxides — and particulate matter, microscopic solids or droplets that can be inhaled into the lungs.

Argonne's Stephen Klippenstein and his collaborators at the University of Pennsylvania examined the Criegee intermediate, a carbonyl oxide that consists of molecules able to break down sulfur dioxide and nitrogen dioxide.

«These effects include wasted resources, foregone revenue and outsized emissions of carbon dioxide as well as local pollutants such as sulfur oxides and nitrogen oxides.

Concerns over the Dreamliner kicked off over a decade ago when Boeing decided to create a civil airliner that would be both lighter than any of its previous jets and fly with leaner - burning engines to cut the plane's emissions of CO2 and nitrogen oxides.

Such technology could cut acid rain — causing sulfur dioxide emissions by more than 90 percent, smog - forming nitrogen oxides by 75 percent, and — ultimately — capture more than 80 percent of the CO2 normally produced by combustion, storing it in nearby depleted oil fields by 2015.

As is common around the country, New York State's Department of Environmental Conservation routinely monitors the levels of ozone, carbon monoxide, sulfur dioxide, nitrogen oxides, and particulates in the air.