Sentences with phrase «fuel combustion contribute»

Those reductions in pollution mean big gains for health, as pollutants from fossil fuel combustion contribute to four of the leading causes of death in the United States: cancer,...

JILA physicists and colleagues have identified a long - missing piece in the puzzle of exactly how fossil fuel combustion contributes to air pollution and a warming climate.

It also says that man's fossil fuel combustion contributes about 5 % of the CO2 in the atmosphere, with the oceans contributing about 60 % and animal respiration along with organic material decay making up about 30 %.

Household air pollution (HAP) emitted from solid fuel combustion contributed to an estimated 2.9 million premature deaths and 81.1 million disability adjusted life - years in 2013.

Not exact matches

The recently published study shows, based on the available information, that traffic (25 %), combustion and agriculture (22 %), domestic fuel burning (20 %), natural dust and salt (18 %), and industrial activities (15 %) are the main sources of particulate matter contributing to cities» air pollution.

The reaction combines the hydroxyl molecule (OH, produced by reaction of oxygen and water) and carbon monoxide (CO, a byproduct of incomplete fossil fuel combustion) to form hydrogen (H) and carbon dioxide (CO2, a «greenhouse gas» contributing to global warming), as well as heat.

The fuel also has a cooling effect on the combustion that allowed the M engineers to endow the engine with a high compression ratio: yet another technical attribute that contributes to both performance and efficiency, while also reducing exhaust emissions and even having a positive effect on how the engine sounds.

Measures to reduce friction losses and thus help enhance engine efficiency include the adoption of narrow, lightweight roller rocker arms and low - friction timing chains, while D - 4S direct fuel injection helps create optimum combustion conditions, contributing to enhanced fuel efficiency.

The use of AVCS contributes to higher power output, while fuel economy is also achieved by improving combustion efficiency through the optimized timing of valve openings and closings.

Measures to reduce friction losses and thus improve engine efficiency include the adoption of narrow, lightweight roller rocker arms and low - friction timing chains, while D - 4S direct fuel injection helps create optimum combustion conditions, contributing to enhanced fuel economy.

Smaller, lighter hybrid system components, higher - energy density in the batteries, and an internal combustion engine touting ground - breaking thermal efficiency (more than forty percent), contribute to a significant advancement in fuel economy,» says the automaker.

Combined with an optimized combustion chamber shape, this allows for an improved fuel - air mixture and more efficient combustion, contributing to better fuel economy and improved torque at low engine speeds.

Many of these small internal combustion engines used for yardwork can release as much as 30 % of the fuel / oil mixture as unburned pollutants into the atmosphere due to incomplete combustion, which not only wastes fuel and money, but also contributes to air pollution.

So, while Co2 can be shown to radiate heat in a lab, the effect of human combustion of fossil fuels contributing roughly 3 % of the.04 % of the atmospheric Co2 levels will have, as I think you and others here have stated, a measured effect indistinguishable from zero.

A climate science which is «uncertain» can still show that climate change is a «serious, pressing threat», since «threat» imports uncertainty, and also still allow for the proposition that human combustion of fossil fuels does not significantly cause that climate change nor contribute to that threat.

For example, residents of the U.S. use 11 kW per person, 85 percent of which comes from the combustion of fossil fuels, which contributes to the rising level of carbon dioxide in the Earth's atmosphere.

Of this, fossil fuel combustion and cement production contributed 375 ± 30 PgC and land use change (including deforestation, afforestation (planting new forest) and reforestation) contributed 180 ± 80 PgC.

For any claim arising from damage to any property whatsoever or any loss or expenses whatsoever resulting or arising from or any consequential loss directly or indirectly caused by or contributed to by or arising from Ionising radiation or contamination by radioactivity from any nuclear waste from the combustion fuel or the radioactive, toxic, explosive or other hazardous properties of any explosive nuclear assembly or nuclear component thereof.

Directly or indirectly caused by or contributed to by or arising from ionising radiation or contamination by radioactive substance from any nuclear fuel or from any nuclear waste from the combustion of nuclear fuel.