它们产生的排放量将取决于驱动它们的电力是如何产生的，而刹车、轮胎和道路在磨损时都会产生微小的空气颗粒。
The level of emissions they cause will depend on how the electricity to run them is generated, while brakes, tyres and roads all create tiny airborne particles as they wear out.
现行的燃烧室要想减少排放量，必须在燃料注入燃烧室之前就通过大量的空气流将燃料混合好。
To reduce emissions in existing combustors, fuel is premixed with a large amount of swirling air flow prior to injection into the combustor.
这样做不仅可以在高空稀薄的空气中开发出更多的宜耕土地，同样亦可减少农产品的运输成本与长途运输所产生的二氧化碳排放量，还能有效降低生鲜农产品在物流过程中无法避免的衰老与腐烂现象。
As well as creating more farmable land out of thin air, this would slash the transport costs and carbon-dioxide emissions associated with moving food over long distances.
基于各种努力，与2000年相比，北京市空气中的硫化物含量减少了近一半，工业烟尘排放量则减少了三份之二。
Because of that and other changes, Beijing’s sulfur emissions have been cut almost in half compared with 2000, and industrial dust has decreased by two-thirds.
清洁空气法令要求主要空气污染源需获得这种许可证，以防止污染物排放量的严重增加。
The Clean air Act requires major sources of air pollution to obtain such permits before making changes that would result in a significant emissions increase of any pollutant.
有很多因素能影响空气污染的程度，包括气候状况、周围环境、汽油排放量的多少以及交通密度。
The amount of air pollution created depended on a number of factors, including weather, surrounding structures, amount of gasoline pumped, and traffic intensity.
史蒂文：我们这些年也在减少有害气体排放量，但是汽车废气排放依然是空气污染的主要原因。
Steven: We have reduced emission of air pollutants in recent years, but cars are still a major source of them.
这些生产过程不仅会造成空气污染和重金属排放，还会消耗能源，而这又会导致更严重的空气污染，并会增加重金属和温室气体排放量。
These processes produce air pollution and heavy metal emissions, and they consume energy - which brings about more air pollution, heavy metal emissions and also greenhouse gases.
我们的发电厂可以通过采用空气和水混合冷却系统来减少蒸汽的排放量。
Our power plants could send less steam into the sky with hybrid air-and-water cooling systems.
医生说，减少二氧化碳排放量还能减少另一种空气污染，特别是积于肺部可直接危害健康的微尘。
Cutting carbon dioxide emissions would also reduce other types of air pollution, especially tiny particles that lodge in the lungs and cause direct health damage, doctors said.
燃烧器管理系统和燃烧器控制系统用于保持氧化氮和二氧化碳的低排放量，减少对空气的污染。
A burner management system and a combustion control system are used to maintain low Nitrogen oxide and Carbon Dioxide emissions which are major environmental concerns.
我们这些年也在减少有害气体排放量，但是汽车废气排放依然是空气污染的主要原因。
We have reduced emission of air pollutants inn c ent years, but cars are still a major source of them.
废油制成的生物柴油燃烧后造成的空气污染通常也比柴油要小，包括颗粒物在内的污染物的排放量更少。
When burned, waste oil biodiesel is also generally cleaner for the air than diesel, emitting lower levels of pollutants, including particulate matter.
由于环境污染的进一步加剧，1990年美国清洁空气条例要求在未来9年里将189种化学毒物的排放量削减90%，其中70%是挥发性有机物。
The USA Clean Air Act of 1990 calls for a 90% reduction in emission of 189 toxic chemicals, 70% of them VOCs, over the next nine years.
在模型中既考虑了气象条件的作用，又考虑了污染排放量和起报日的污染浓度，与以往的空气污染预报统计模型相比，所依据的物理基础更可信一些。
In this model the effect of meteorological element, output and concentration of air pollutant were considered, so it's physical foundation may be more believable than pure statistics model.
研究结果认为：在燃气喷口两侧布置两个矩形空气喷口的烧嘴，氮氧化物排放量低于圆形空气喷口烧嘴；
The results show that NOx emission was abated when the nozzle with two circle air jet was converted into the nozzle with two rectangular air jet.
通过对其环境空气污染物排放量计算方法的初步研究，论述了燃气-蒸汽联合循环燃油机组工程环保设计中应注意的一些问题。
The article discussed the question that should be noticed in gas-steam unite circle generate electricity aircrew environment protection design via the primary research on the account measure of...
通过对其环境空气污染物排放量计算方法的初步研究，论述了燃气-蒸汽联合循环燃油机组工程环保设计中应注意的一些问题。
The article discussed the question that should be noticed in gas-steam unite circle generate electricity aircrew environment protection design via the primary research on the account measure of...
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