The main toxic gases are carbon monoxide, carbon dioxide, hydrogen sulfide, and nitrogen oxide.

主要有毒气体是氧化碳、二氧化碳、硫化氢和氮氧化物。

So, I think a better question would be what can we do about NOx pollution.

所以，我认为个更好的问题是我们能为氮氧化物污染做些什么。

The crisis which erupted in September involved nitrogen oxide emissions from diesel cars.

大众于九曝出柴油发动机氮氧化物排放造假丑闻。

Public prosecutors said Porsche had been negligent from 2009 in ensuring nitrogen oxide emissions did not breach regulations.

公诉人表示，从2009起，保时捷就在确保氮氧化物排放不违法方面，存在疏忽。

Finally, there's nitrous oxide, making up six percent of the problem.

最后，还有氮氧化物，占问题的6%。

You can reduce nitrogen oxides by 80 percent, carbon dioxide by more than 40 percent.

您可以 80% 的氮氧化物， 40% 以上的二氧化碳。

So that means, so nitric oxide is a gas, it's produced in the endothelium.

所以这意味着，氮氧化物是种气体，它在内皮中产生。

Yeah, well, let's go back to that topic of like ENOS.

好吧，让我们回到关于内源性氮氧化物的话题。

Most cars produced since the 1980s are equipped with catalytic converters that reduce the emission of carbon monoxide and nitrogen oxides.

在 1980 代制造的大部分汽车都配有触媒转化器，氧化碳和氮氧化物的排放。

For instance, government efforts to cut emissions of carbon dioxide and nitrous oxide are greater than for many other greenhouse gases.

例如政府对于二氧化碳和氮氧化物所采取行动明显大于其他温室气体。

We will keep intensifying efforts to prevent and control pollution.

巩固扩大蓝天保卫战成果，今二氧化硫、氮氧化物排放量要下降3%，重点地区细颗粒物（PM2。5）浓度继续下降。持续开展京津冀及周边、长三角、汾渭平原大气污染治理攻坚，加强工业、燃煤、机动车三大污染源治理。做好北方地区清洁取暖工作，确保群众温暖过冬。

Sulphur dioxide and nitrogen oxide combine to form acid rain.

【form】二氧化硫和氮氧化物结合形成酸雨。

Oxides of nitrogen emissions were also reduced with relatively low-cost technologies.

成本相对较低的技术也了氮氧化物的排放。

So the first sign and symptom of nitric oxide deficiency is usually erectile dysfunction.

因此，氮氧化物缺乏的第个迹象和症状通常是勃起功能障碍。

Many of the world's cities are clogged with traffic, creating fumes containing gases such as nitrogen oxides.

世界上许多城市交通堵塞，产生含有氮氧化物等气体的烟雾。

The coating reacts with natural daylight  to decompose surrounding nitrogen oxides, effectively " cleaning" a city's air.

该涂层与自然光发生反应，分解周围的氮氧化物，有效地“净化”城市的空气。

Meanwhile, the incomplete combustion of gas in motor vehicles releases nitrous oxide.

与此同时，机动车内汽油的不完全燃烧会释放出氮氧化物。

Oxides of nitrogen and sulfur dioxide can appear naturally as a short-lived byproduct of volcanic eruptions or lightning strikes.

氮氧化物和二氧化硫可以作为火山喷发或雷击的短暂副产品自然出现。

So someone that's struggling with their nitric oxide levels at the moment, what kind of symptoms would they experience?

所以目前氮氧化物水平较低的人，会经历什么样的症状呢？

And yeah, nitric oxide is the main signaling molecule that is a driver for erections.

而且，氮氧化物是主要的信号分子，它是勃起的驱动因素。