为减少空气污染，政府需要设定碳排放上限。
To reduce air pollution, the government needs to impose a ceiling on carbon emissions.
结果当地许多地方的空气污染状况最终得到了缓解，但排放到地球大气层的温室气体却在日益增加。
The result is that local air pollution is finally easing in many places but emissions of greenhouse gases into the planet's atmosphere are increasing.
三年前，莫拉莱斯出台禁令禁止进口排放浓烟的旧车以减少空气污染和缓解交通拥堵。
Three years ago Mr Morales banned imports of the oldest among these smoke-belching jalopies, to cut air pollution and traffic congestion.
即使全国各地的火力发电厂已经开始行动减少空气污染物的排放，但是却带来另一个问题——水质污染。
Even as a growing number of coal-burning power plants around the nation have moved to reduce their air emissions, many of them are creating another problem: water pollution.
而且就在上个月，我们确立了另一个第一：针对我们国家发电厂排放的汞、砷、和其他空气污染的第一个全国标准。
And just last month, we set another first: the first national standards for mercury, arsenic and other air pollution from our nation's power plants.
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.
减少炭黑排放还能带来健康的额外好处，因为空气污染少了，死于呼吸道疾病的人也少了。
And cutting back on black carbon will also pay immediate health dividends, with less air pollution and fewer deaths from respiratory diseases.
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.
差不多7吨的氨气排放，而氨气是一种主要的空气污染物。
对于空气污染程度仍然很高的国家，尽管它们实施了相关政策来降低空气污染，作为世卫组织准则的一部分，也对之提出了过渡目标，鼓励其逐步缩减排放物。
The WHO guidelines provide interim targets for countries that still have very high levels of air pollution to encourage the gradual cutting down of emissions.
有很多理由可以支持我的观点。首先，不可否认的是私人汽车的尾气排放是空气污染的一大罪恶。
There are reasons accounting for my view. To begin with, there is no denying that gas emission of private car is a great evil of air pollution.
排放控制系统按法规要求来降低发动机可能产生的空气污染。
The emission control system is required by law to reduce the air pollution the engine could produce.
然而，随着汽车越来越多，废气排放、空气污染问题变得更加严重。
However, with more and more waste gas being discharged by the cars, the problem of air pollution becomes even more serious.
报告指出，室外空气污染由汽车尾气排放、大量使用化石燃料、粉尘和焚烧垃圾引起，在低收入的城市地区最为常见。
The outdoor air pollution is most common in low-income, urban areas and is caused by vehicle emissions, heavy use of fossil fuels, dust and burning of waste, the report said.
空气污染产生的主要原因是发电厂，工厂和汽车燃烧燃料后排放出的碳粒子。
Most air pollution is made up mainly of carbon particles that are produced when fuel is burned by power plants, factories, and cars.
现在，煤电行业可能正在应付新的联邦排放标准、空气污染法规、甚至是碳定价这一概念，但对于零碳排放的核能而言，以上种种却非常有利。
The coal industry may be fighting new federal emissions standards, air-pollution regulations and even the idea of carbon pricing, but those things are all a boon for carbon-free nuclear power.
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.
因为它排放的气体会产生大量的二氧化碳，这可能最终导致空气污染。
Becauseits gas will produce lots of carbon dioxide, which may enventually lead to air pollution.
美国各地的城市都在治理空气污染，做法是控制汽车废气排放、限制使用薪柴炉和监测工厂污染。
Cities across the U. S. are cracking down on air pollution by enforcing auto emissions control, limiting the use of wood burning stoves, and by monitoring factory pollution.
众所周知，中国城市的空气污染可归咎为旧型汽车、卡车、燃煤电厂和工厂的排放。
Chinese cities are notorious for noxious air blamed on emissions from older cars and trucks, coal-fired power plants and factories.
到目前为止，我们的问题是——排放问题，污染的各种浓度，空气污染，气候的各种破坏。
So far, we are the places of the problems - the emissions, the concentrations of all kinds of pollutions, air pollution, all kinds of destruction of the climate.
到目前为止，我们的问题是——排放问题，污染的各种浓度，空气污染，气候的各种破坏。
So far, we are the places of the problems - the emissions, the concentrations of all kinds of pollutions, air pollution, all kinds of destruction of the climate.
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