Sentences with phrase «for oxides of nitrogen»

John, «The current administration is in the process of reducing the standards for oxides of nitrogen and sulfur dioxide.»

The current administration is in the process of reducing the standards for oxides of nitrogen and sulfur dioxide.

There are many sources for oxides of nitrogen: the ocean, peat bogs, microbial denitrification in soils, etc..

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.

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

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.

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).

«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.

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.»

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.

«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.

Results were strongest for fine particulate matter and the traffic - related pollutant gases called oxides of nitrogen.

Formed in the presence of sunlight by water vapor and pollutants like ozone and nitrogen oxides, hydroxyl is hard to measure, because it persists for just a second in the air before it reacts away.

What proved possible included an extension of the Kyoto Protocol for a period of either five or seven years (excluding Canada, Japan and Russia but adding nitrogen trifluoride, used in semiconductor manufacture, to the list of gases covered — CO2, methane, nitrous oxide, sulfur hexafluoride, perfluorocarbons), a Green Climate Fund to help low - income countries cope (albeit without any actual funds yet), an Adaptation Committee to coordinate such efforts globally, rules for a global program to reduce deforestation and how to monitor such deforestation, and a Climate Technology Center that will help launch projects to reduce greenhouse gas emissions.

FIELD FUMES California's agricultural regions are responsible for between 20 and 51 percent of the total emissions of nitrogen oxide gases in the state, new research finds.

Catalysts have been an integral part of diesel - and gasoline - powered engines since the mid-1970s as federal regulations called for reductions of carbon monoxide, hydrocarbons and nitrogen oxides.

Wang's research group designed a five - metal catalyst based on these high - entropy - alloy nanoparticles and demonstrated superior catalytic performance for selective oxidation of ammonia to nitrogen oxide, a reaction used by the chemical industry to produce nitric acid, an important chemical in the large - scale production of fertilizers and other products.

Natural gas produces a quarter of the nitrogen oxides emitted by coal and half the carbon dioxide for every unit of electricity generated.

China already has more than 20 local trading platforms that allow industrial firms to buy and sell permits for pollutants like sulphur dioxide and nitrogen oxides, major constituents of smog and acid rain.

Emissions of nitrogen oxides, one of the biggest problems for lean - burn engines, were reduced to 0.09 grams per kilometre — 25 per cent less than the US standard proposed for 2004.

Heavy - duty vehicles, such as commercial trucks and buses, were found to be, by far, the largest contributor of emissions, accounting for 76 percent of the total excess nitrogen oxide emissions.

Overall, coal - fired power plants and motor vehicles spew out most of the nation's nitrogen oxides, the feedstock for nitric acid rain.

The study finds that titanium dioxide coatings, seen as promising for their role in breaking down airborne pollutants on contact, are likely in real - world conditions to convert abundant ammonia to nitrogen oxide, the key precursor of harmful ozone pollution.

«We show that uptake of atmospheric NH3 (ammonia) onto surfaces containing TiO2 (titanium dioxide) is not a permanent removal process, as previously thought, but rather a photochemical route for generating reactive oxides of nitrogen that play a role in air pollution and are associated with significant health effects,» the authors write.

The policy document also set new targets for the closure of coal - fired heating systems as well as the installation of equipment to reduce sulfur dioxide and nitrogen oxide emissions at power stations, steel mills and cement plants.

The researchers calculate that, in areas where the titanium dioxide technology is used, ammonia degradation could account for up to 13 percent of the nitrogen oxides in the immediate vicinity.

-- For a covered entity described in section 700 (13)(C), 1 emission allowance for each ton of carbon dioxide equivalent of fossil fuel - based carbon dioxide, nitrous oxide, or any other fluorinated gas that is a greenhouse gas (except for nitrogen trifluoride), or any combination thereof, produced or imported by such covered entity during the previous calendar year for sale or distribution in interstate commerFor a covered entity described in section 700 (13)(C), 1 emission allowance for each ton of carbon dioxide equivalent of fossil fuel - based carbon dioxide, nitrous oxide, or any other fluorinated gas that is a greenhouse gas (except for nitrogen trifluoride), or any combination thereof, produced or imported by such covered entity during the previous calendar year for sale or distribution in interstate commerfor each ton of carbon dioxide equivalent of fossil fuel - based carbon dioxide, nitrous oxide, or any other fluorinated gas that is a greenhouse gas (except for nitrogen trifluoride), or any combination thereof, produced or imported by such covered entity during the previous calendar year for sale or distribution in interstate commerfor nitrogen trifluoride), or any combination thereof, produced or imported by such covered entity during the previous calendar year for sale or distribution in interstate commerfor sale or distribution in interstate commerce.

The specialized instruments onboard the aircraft sampled the plume for aerosol particle size distribution and composition as well as concentrations of pollutant gases such as sulfur dioxide, nitric oxide, nitrogen dioxide, ozone, and volatile organic compounds (VOCs).

This early theft sets the stage for ammonia to react with the charged nitric oxide in the first of several chemical steps, ultimately pumping out atmospheric nitrogen and water.

Nitrogen, in the form of nitric oxide (one nitrogen atom and one oxygen atom), has been detected for the first time on the surface of Mars by a team of researchers using the Sample Analysis at Mars (SAM) instrument suite aboard NASA's Curiosity rover, adding to the growing speculation that life could have once flourished on ancient Mars.

Why It Matters: Catalysts have been an integral part of the exhaust systems of diesel - and gasoline - powered engines since the mid-1970s when federal regulations called for reductions of carbon monoxide, hydrocarbons and nitrogen oxides.

L - arginine is the precursor to the formation of the nitrogen oxide molecule, a compound responsible for controlling the widening of blood vessels.

The systems employed by BLUETEC serve in particular to reduce nitrogen oxides (NOx)-- the only constituent part of the exhaust gases which, due to the design of the diesel, inherently lies above the value for petrol engines.

Most of Volkswagen's diesel competitors opted for urea - injection, using an additive called AdBlue contained in a separate reservoir that helps to reduce nitrogen oxide emissions.

The six - cylinder 3.0 TDI clean diesel is equipped with a system for the effective reduction of nitrogen oxides.

Mass production of Diesel Particulate - NOx Reduction (DPNR) system, the world's first system for simultaneously reducing diesel particulate matter and oxides of nitrogen, adopted in the 1CD - FTV engine

A NOxtrap system for reducing the nitrogen oxides is also used, in addition to the two bulkhead catalytic converters and controlled recirculation of exhaust gas in each branch.

For the past ten years the plant has been operating without the level of emissions controls to limit sulfur dioxide and nitrogen oxide emissions as stipulated in the Clean Air Act.

According to the Chinese Centre for Disease Control and Prevention, the burning of coal is responsible for 70 percent of the emissions of soot that clouds out the sun in so much of China; 85 percent of sulfur dioxide, which causes acid rain and smog; and 67 percent of nitrogen oxide, a precursor to harmful ground level ozone.

Shipping is responsible for 18 - 30 % of all the world's nitrogen oxide (NOx) pollution and 9 % of the global sulphur oxide (SOx) pollution.

The 300 plants produce one - quarter of all the electricity generated in the EU but are responsible for more than 70 % of the EU's sulphur dioxide emissions and more than 40 % of nitrogen oxide emissions from the power sector.

No examples of measurement of nitrous oxide emissions from deep banded nitrogen (N) fertilizer have been found to date for western Canada.

According to the Environmental Protection Agency, fossil fuels are lethal for environmental ecosystems (in addition to causing massive landslides, oil spills, underground tar leaks, and all of that good stuff) and produce extremely lethal toxic air emissions, including methane, carbon dioxide, and nitrogen oxide.

The gases responsible for creating low - level ozone are carbon monoxide, the oxides of nitrogen (all found in car exhaust fumes), methane, and other hydrocarbons.

An analysis of emissions prepared for the lawsuit shows that the three plants emit nearly 200,000 tons of sulfur dioxide and nitrogen oxide every year.

Environmental groups and national park advocates had hoped the plan would require Rocky Mountain Power to retrofit two of its biggest Utah plants with the best technology available today for capturing nitrogen oxide emissions.

The group now wants to determine the ratio of nitrogen - 14 and nitrogen - 15 isotopes for individual sources of nitric oxides, including lightning, biomass burning, bacterial «fixing» of nitrogen, and fossil fuel burning.

Progress is however markedly slower for eutrophication, which is caused by excess nitrogen deposition resulting from emissions of nitrogen oxides (NOx) and ammonia (NH3).