Sentences with phrase «emitted oxides of nitrogen»

The Code notes that shutting down an engine during taxi - in operations can deliver reductions of 20 to 40 per cent of the ground level fuel burn and CO2 emissions, and 10 to 30 per cent of ground emitted oxides of nitrogen (NOx) emissions, depending on aircraft type and operator technique.

Not exact matches

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.

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.

«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.

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

The amount of nitrous oxide in the atmosphere has quickly increased as well, with about a third of the total added by human activity — much of that emitted by nitrogen - based fertilizers, and half of that from just three nations: China, the Soviet Union, and the United States.

Nitrous oxide, produced by the bacterial breakdown of nitrogen, is now the dominant ozone - depleting substance emitted by humans, a new study shows

Like vehicles and power plants, trees emit airborne chemicals called volatile organic compounds (VOCs), which in the presence of sunlight react with nitrogen oxides in vehicle fumes to form ozone, one of the components in smog that makes it a health threat.

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

Because of testing inefficiencies, maintenance inadequacies and other factors, cars, trucks and buses worldwide emit 4.6 million tons more harmful nitrogen oxide (NOx) than standards allow, according to a new study co-authored by University of Colorado Boulder researchers.

I criticized this statement, noting that the actual emissions from U.S. coal - burning power plants declined only from 16.1 million tons to 12.4 million tons between 1980 and 1998 in the case of sulfur dioxide and from 6.1 million tons to 5.4 million tons between 1980 and 1998 in the case of nitrogen oxides (mostly emitted as NO, not NO2, but by convention measured as tons of NO2 - equivalent).

«It is true that there are other factors (such as volcanism, the changes in the orbit and the axis of the Earth, the solar cycle), but numerous scientific studies indicate that most of the global warming in recent decades is due to the large concentration of greenhouse gases (carbon dioxide, methane, nitrogen oxide and others) mainly emitted due to human activity.»

This includes measures addressing sulphur oxide (SOx) and nitrogen oxide (NOx), which have been successful in lowering the amount of those pollutants being emitted from ships.

«Most of the harmful chemicals in your exhaust such as carbon monoxide and nitrogen oxide are emitted when starting up the engine,» said McEwen.

Volkswagen Group's so - called «defeat - device» emissions software has allowed hundreds of thousands of diesel vehicles from the 2009 - 16 model years to emit nitrogen oxide at illegal levels while thwarting emissions tests.

The high - mileage D4 direct - injection gasoline engine remains too expensive and emits too much oxides of nitrogen to meet U.S. emissions regulations.

The Mirage has a tiny 1.2 - liter three - cylinder engine with variable valve timing that emits a fraction of the hydrocarbons, nitrogen oxides and carbon monoxide of cars built in the Excel's era.

It is true that there are other factors (such as volcanism, the changes in the orbit and the axis of the Earth, the solar cycle), but numerous scientific studies indicate that most of the global warming in recent decades it is due to the large concentration of greenhouse gases (carbon dioxide, methane, nitrogen oxide and others) mainly emitted due to human activity.

Garden equipment engines, which have had unregulated emissions untill very recently, 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 metropolitan areas.

With all that renewable energy comes over 100,000 jobs, and a huge reduction in carbon dioxide (27 million pounds of CO2 that is not emitted by power plants) and a reduction in smog producing nitrogen oxides and the health threatening fine particulate matter.

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.

They are allowed to emit about 50 percent more grams of particles and nitrogen oxides per kilowatt - hour.

But China also emits a significant amount of GHGs besides carbon dioxide — methane, nitrous oxide, hydrofluorocarbons (HFCs), perfluorocarbons, sulfur hexafluoride and nitrogen trifluoride — collectively referred to as non-CO2 GHG emissions.

All of Bullfrog Power's electricity comes from wind and low - impact hydro facilities that do not emit any carbon dioxide, nitrogen oxides and sulphur dioxide (precursors to smog), particulate matter (which gives rise to respiratory disease), heavy metals (mercury, lead, cadmium) and carcinogens.

Aircraft not only emit 12 percent of CO2 emissions from U.S. transportation sources — they also emit nitrogen oxides other than nitrous oxide, causing warming when emitted at high elevation.

When compared with pure electric vehicles that use coal - generated electricity, H600's emission of sulfide, nitrogen oxide, and particle matter is 0.17 %; 0.67 %; and 50 % of the latter, respectively (a typical coal power plant emits 272 grams of PM when generating one kWh of electricity).

While the EPA has, under the Clean Air Act put federal limits on toxic emissions of arsenic, mercury, and lead pollution that power plants emit — as well as on pollutants like sulfur dioxide and nitrogen oxides — there are currently no such limits on the carbon emissions from new or existing power plants.

Ozone is an odorless gas that is not directly emitted into the air but is created by chemical reactions between nitrogen oxides (NOx) and volatile organic compounds (VOC)-- which occur naturally but are also produced from the burning of fossil fuels and are released in the process of drilling for oil and natural gas.

Better air quality: If the same amount of electricity as that generated by America's 10,000 - MW wind turbine fleet were instead produced using the average utility fuel mix, it would emit 73,000 tons of sulfur dioxide and 27,000 tons of nitrogen oxide per year, as well as other pollutants such as mercury.

Crikey John, I didn't know Norway's city buses was run on biomethane a by - product of treated sewage which emits 78 percent less nitrogen oxide and 98 percent fewer fine particles two causes of respiratory illnesses and is 92 percent less noisy.

In addition, variable amounts of soil carbon are lost to oxidation and erosion, and nitrogen oxides (potent greenhouse gases) are emitted.

In 2013, transportation contributed more than half of the carbon monoxide and nitrogen oxides, and almost a quarter of the hydrocarbons emitted into our air.

CO2 from ships makes up roughly 3 percent of all human - emitted CO2 and almost 30 percent of smog - forming nitrogen oxide gases.

These facilities are being built rapidly and emit 25 - 33 % less CO2 and significantly reduce or eliminate emissions, such as oxides of sulphur and nitrogen, and particulates.