Sulfur dioxide (SO2) and nitrogen dioxide (NO2) are gases that are reactive, toxic, and a strong irritant to the eyes and respiratory tract by forming acids.
3952
二氧化氮可以到达肺的深部（肺的气体交换关键部位）,因此即使低浓度的二氧化氮也可能引起延迟性肺水肿。
Nitrogen dioxide may reach the deep portions of the lungs (the critical gas exchange area of the lungs) so that even low concentrations may cause pulmonary oedema, which may be delayed Carbon monoxide (CO) is a common by-product of incomplete combustion.
3953
一氧化碳（CO）是不完全燃烧的一种常见产物。
The toxicity of CO is acute and stems from its high affinity to the hemoglobin molecule in red blood cells Particulates of different size mostly elemental carbon (soot) and hydrocarbons determine black color of plum.
3954
由于其对红血球中血红蛋白分子的亲和力高，会造成一氧化碳急性中毒。
Particulate’s size plays a critical role in determining how long they will be suspended in the air as well as their health effects (the lower size the longer they are suspended).
3955
着火时冒黑烟的原因是烟羽中不同大小的颗粒物多为元素碳（烟灰）和烃类化合物。
Volatileorganic compounds can include benzene which is a known carcinogen.
3956
颗粒物的大小决定了其在空气中悬浮的时间及其对健康的影响（颗粒物越小，悬浮时间越长）。
Polycyclic aromatic hydrocarbons are a group of hydrocarbons produced by the incomplete combustion of oil which have been characterized as known or suspected carcinogens.
3957
挥发性有机化合物可能包括已知致癌物——苯。
Considering the low level of PAHs detected so far in oil products combustion plume, it is likely that they present only a small exposure hazard.
3958
3. 石油和石油产品着火时释放的化学物质会带来哪些健康风险？
3. What are health risks due to the chemicals released during oil and oïl products fire?
3959
吸入是主要的暴露途径。
Inhalation is prevailing pathway of exposure.
3960
由此产生的健康影响取决于吸入污染物的浓度、暴露的持续时间以及石油火灾及其黑烟的距离/位置。
Any resulting health effects would have depended on the concentration of the inhaled pollutants, the duration of exposure, and the proximity/location of the oil fires and its plume.