Sentences with phrase «emitted as pollutants»

Not exact matches

Ground - level ozone is a secondary pollutant, meaning that it is not emitted directly, but forms when sunlight triggers reactions between natural and human - caused chemical emissions, known as ozone precursor gases.

Human activities, such as industrial production, transport, power generation, and wood burning emit large amounts of tiny pollutant particles containing, for example, soot and sulfate, into the atmosphere.

For the coal system, the study estimates the toxicity associated with air pollutants emitted during power generation, as well as toxic chemical releases during the coal - mining process from acid - mine drainage and coal - ash impoundment.

«The next step will be to work on quantifying the impact of pollutants emitted from the daily burning of biotic materials, such as incense, in over two million Hindu temples in India and Nepal.»

Aggressive measures to curtail the use of fossil fuels and emissions of so - called short - lived climate pollutants such as soot, methane and HFCs would need to be accompanied by active efforts to extract CO2 from the air and sequester it before it can be emitted.

These particles are emitted directly from natural sources or human activity, or they form from precursors emitted originally as gaseous pollutants.

(He will also track participants» exposure to indoor air pollutants, such as the volatile organic compounds emitted by paint and furniture.)

Once emitted into the air, key nitrogen pollutants — ammonia and nitrogen oxides — can be transformed to secondary pollutants such as ammonium and nitrates, and then washed to Earth by rain and snow.

Plant - emitted hydrocarbons break down through chemical interactions with certain air pollutants such as ozone.

Both are pollutants, but the first is dominated by sulphate emissions from coal burning power plants, the second from ozone precursors such as NOx, volatile organic compounds, and carbon monoxide mainly emitted from vehicles.

«The increased use of clean energy sources that do not emit greenhouse gases or conventional air pollutants... would be doubly beneficial to global food security, as they do not contribute to either climate change or increased surface - ozone concentrations,» she said.

As cars become more fuel - efficient, less heat is wasted in the exhaust, which makes it harder to clean up the pollutants that are emitted.

There is no single known cause for SBS but factors that may be involved include pollutants such as dust, fungal spores and carpet fibres, as well as ozone emitted from equipment such as printers.

However, since the vehicle will emit more pollutants than it should, it is important to have diagnostics and repairs completed as soon as possible.

FCA submitted a software patch as a part of its application to certify 2017 model year Jeep Grand Cherokee and Ram 1500 diesel that reportedly addresses «calibration» issues with the engines, which the U.S. government accused of emitting greater than advertised levels of pollutants in on - road conditions.

If you can, avoid rush hour, as sitting in traffic burns more gas and emits more pollutants.

As a zero - emission vehicle that emits no carbon dioxide or other pollutants Mazda intends to lease approximately 100 units in total, mainly to local governments and corporate customers in the Chugoku region of Western Japan (where Mazda's headquarters are located).

She asked him to explain his dissent in the 2007 case in which the Supreme Court ruled that the Environmental Protection Agency had the authority to regulate carbon dioxide, the main greenhouse gas emitted by human activities, as a pollutant under the Clean Air Act.

What's more, wind and solar plants don't even fall under the domain of the Clean Air Act, he said, as the law only regulates «sources» which emit air pollutants.

It has sometimes been quoted that just a few ships (all using fuel oil with maximum permitted sulphur content) emit as much harmful air pollutants as all the cars in the world (if the cars were all using the cleanest fuel available).

Emissions of smog - forming pollutants also are sizable — as of 2007, accounting for roughly one - sixth of the smog - forming gases emitted in the United States.

It delves into the impacts of aerosols, which are tiny pollutants of mineral dust, soot and organic matter emitted by sources such as power plants, factories and quarries.

Under the previous president, Barack Obama, the U.S. used environmental rules to encourage the closing or costly upgrade of coal plants because burning the fuel emits almost twice as much carbon dioxide as natural gas and 28 percent more pollutants than heating oil.

He concluded that as renewable energy sources have low energy density, more fossil - fuel such as natural gas should be burned for power generation, hence more pollutants emitted.

This is because HF has unleashed vast supplies of clean, affordable gas, and this in turn has allowed natural gas to produce much more of America's electricity — with natural gas emitting half the carbon emissions as other sources and virtually no hazardous air pollutants.

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.

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.

Since renewables» energy density is low, fossil fuels should be used to complement renewables and as a result, more pollutants can be emitted.

However, unless managed carefully, coal - fired power plants emit pollutants such as sulphur dioxide (SO2), nitrous oxide (NOX), particulates, and high levels of greenhouse gases.

SCALIA, J. (Dissenting, page 08): «Air pollutant» is defined by the Act as «any air pollution agent or combination of such agents, including any physical, chemical,... substance or matter which is emitted into or otherwise enters the ambient air.»

These equity concerns include: the regressive impact of potential energy price increases on low - income households; the potential for carbon pricing policies to allow some fossil fuel - fired power plants or refineries to continue to operate and emit air and water pollutants in neighborhoods already burdened by pollution; and the economic hardship to workers and communities dependent on fossil fuel industries for livelihoods or for their tax base as we transition away from these resources.

Excludes the following units from consideration as major emitting facilities or major stationary sources (or parts thereof) for purposes of compliance with provisions concerning prevention of significant deterioration of air quality and plan requirements for nonattainment areas: those that achieve a specified limit on particulate matter emissions or certain national emissions standards for hazardous pollutants or those with properly operated and maintained equipment to limit particulate matter emissions and that use good combustion practices to minimize carbon monoxide emissions.

We are hopeful that Mr. Trump and his campaign will take a closer look at energy efficiency as an energy resource to promote energy security so that current and future generations are less dependent on imported fuels as well as to ensure that we all have cleaner air to breathe since energy efficiency helps reduce the smog and global warming pollutants emitted from fossil - fueled power plants.

Utilities should consider extending the licenses of power plants, which unlike coal and natural gas plants, do not emit any major air pollutants as identified in the Clean Air Act,» said Roy Schwitters, chair of the APS report.

Commercial ships emit almost half as much particulate pollutants into the air globally as the total amount released by the world's cars, according to a new study led by the National Oceanic and Atmospheric Administration and the University of Colorado at Boulder.

Motor vehicles emit numerous hazardous pollutants that the Environmental Protection Agency classifies as known or probable human carcinogens.

As Carnegie's grantees, Caldeira and Persad aim to help countries optimize how they meet their commitments under the Paris Agreement by focusing on the short - lived air pollutants, like soot, which are co-emitted by many of the same processes that emit the longer - lived carbon dioxide that is the main focus of most countries» Paris commitments.