二次有机气溶胶（SOA）在雾霾中为何难以治理？
Why are secondary organic aerosols hard to control in haze?
SOA并非直接排放，而是挥发性有机物经氧化、成核、多相反应在大气中'长'出来的，前体物来源复杂（植被、燃烧、溶剂等），且其产率随氧化程度和气溶胶载荷非线性变化，使源解析与减排靶点都很模糊。
SOA is not emitted directly; it grows in the atmosphere from VOC oxidation, nucleation, and multiphase reactions, with diverse precursors (vegetation, combustion, solvents) and yield that varies non-linearly with oxidation and loading—making source apportionment and control targets fuzzy.
难度 专业 · 适合 高中(15-18)
CC BY 4.0 · 已核验 · Verified 2026-10-04
来源 · Source
Atmos. Chem. Phys.
Atmospheric Chemistry and Physics
独立核验依据 · Independent verification: 核验依据 1 ISBN 978-1-119-22117-3 (2006, Wiley)
#二次气溶胶 #源解析
室内空气污染在低收入国家的致死负担为何常被低估？
Why is indoor air pollution's death toll underrated in low-income countries?
全球约24亿人仍用固体燃料（薪柴、煤）在通风不良的室内烹饪取暖，释放PM、一氧化碳与多环芳烃，WHO估计其每年导致数百万例卒中、慢阻肺和儿童肺炎死亡，但因发生在家庭私密空间而长期缺乏监测与政策关注。
About 2.4 billion people still burn solid fuels indoors with poor ventilation, releasing PM, CO and PAHs; the WHO links this to millions of annual deaths from stroke, COPD and childhood pneumonia—yet it is under-monitored because it happens inside homes.
难度 专业 · 适合 高中(15-18)
CC BY 4.0 · 来源待核验 · Source pending review
来源 · Source
出处备注：本题原挂出处与答案内容不符，已撤回；具体书目待补，暂不展示来源。
本题原挂出处与答案内容不符，已撤回；具体书目待补。
Previous citation withdrawn as unsupported for this answer; a specific source is pending.
#室内污染 #固体燃料
“一次污染物”和“二次污染物”有何区别？请举例说明。
What is the difference between primary and secondary pollutants? Give examples.
一次污染物是直接从污染源排入大气的物质，如二氧化硫、一氧化碳、颗粒物；二次污染物则是在大气中由一次污染物经光化学反应等新生成的污染物，如地面臭氧、硫酸盐和硝酸盐气溶胶。许多城市的臭氧超标主要来自二次生成，而非直接排放。
Primary pollutants are emitted directly from sources, such as sulfur dioxide, carbon monoxide, and particulate matter. Secondary pollutants form in the atmosphere when primary pollutants undergo new reactions—such as photochemistry—producing ground-level ozone and sulfate or nitrate aerosols. Much urban ozone exceedance comes from secondary formation rather than direct emission.
难度 专业 · 适合 高中(15-18)
CC BY 4.0 · 来源待核验 · Source pending review
来源 · Source
出处备注：著录含书名，但缺版次 / 出版社 / 年份中的一部分，需编辑补全后才能做独立比对。
美国环保署（EPA）《我国空气：2020年现状与趋势》（Our Nation's Air）及国家环境空气质量标准（NAAQS）污染物分类
U.S. Environmental Protection Agency (EPA), 'Our Nation's Air: Status and Trends Through 2020' and National Ambient Air Quality Standards (NAAQS) pollutant classifications
#一次污染物 #二次污染物 #地面臭氧 #光化学 #硫酸盐气溶胶
气溶胶对气候有哪两种主要效应？
What are the two main climate effects of aerosols?
气溶胶的直接效应是散射或吸收阳光，多数情况下使地表降温；间接效应是作为云凝结核改变云的厚度与寿命，通常也让云更亮、反射更多阳光。二者部分抵消了温室气体造成的升温，但本身也是健康污染物。
Aerosols' direct effect is scattering or absorbing sunlight, usually cooling the surface; their indirect effect is changing cloud brightness and lifetime by acting as cloud condensation nuclei, also tending to cool. They partly offset greenhouse warming yet are themselves harmful pollutants.
难度 专业 · 适合 小学高段(9-12)
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
戴树桂 主编,《环境化学》第2版,高等教育出版社,2006
Dai Shugui ed., Environmental Chemistry, 2nd ed., Higher Education Press, 2006
独立核验依据 · Independent verification: 核验依据 2 DOUBAN ISBN 标识 9787040199567（按标识回读: 环境化学）
#气溶胶 #直接效应 #间接效应
氮沉降（nitrogen deposition）作为'隐性污染'如何影响生态系统？
How does nitrogen deposition, a 'hidden pollutant', affect ecosystems?
过量活性氮（NH3、NOy）沉降使贫氮生态系统富营养化，改变物种竞争、抑制固氮与菌根，导致生物多样性下降与土壤酸化，并可在湿地中转化为笑气（N2O）加剧温室效应，其影响常滞后数十年才显现。
Excess reactive nitrogen (NH3, NOy) deposition eutrophies nitrogen-poor ecosystems, shifts species competition, suppresses nodulation and mycorrhizae, lowers biodiversity, acidifies soils, and can convert to N2O in wetlands—effects often delayed by decades.
难度 专业 · 适合 高中(15-18)
CC BY 4.0 · 来源待核验 · Source pending review
来源 · Source
出处备注：此条未指向带版次的可引用著作（通识性内容、机构文件或未展开的英文书名），本库不提供独立书目出处；如需精确引用，需由编辑补全具体篇目与版次。
Nature;Global Nitrogen Initiative
Nature;GNI
#氮沉降 #富营养化
细颗粒物（PM2.5）是如何进入血液循环并影响全身的？
How does fine PM2.5 enter the bloodstream and affect the whole body?
PM2.5 足够细小，可穿过肺泡进入血液，并携带重金属、多环芳烃等有害物质随循环到达心脏、大脑等器官。长期暴露与心脏病、中风、肺癌和认知下降相关，因此 WHO 不断收紧其浓度指导值。
PM2.5 is small enough to cross the lung alveoli into the blood, carrying heavy metals and PAHs to organs like the heart and brain. Long-term exposure links to heart disease, stroke, lung cancer and cognitive decline, so the WHO keeps tightening its guideline values.
难度 专业 · 适合 小学高段(9-12)
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
左玉辉 主编,《环境学》第2版,高等教育出版社,2009
Zuo Yuhui ed., Environmental Science, 2nd ed., Higher Education Press, 2009
独立核验依据 · Independent verification: 核验依据 2 DOUBAN ISBN 标识 9787040283327（按标识回读: 环境学）
#PM2.5 #入血 #全身影响
由SO2、NOx与氨气经大气化学反应生成的二次PM2.5,为什么比烟囱直接排出的初级颗粒物更难在区域尺度上压降?
Why is secondary PM2.5 formed when SO2, NOx, and ammonia react in the atmosphere harder to bring down at regional scale than primary particles released directly from stacks?
三种前体物分属电力、交通与农业等不同部门,只治理单个行业无法同步削峰,农业氨至今缺乏强制性约束,硝酸盐生成又常受氨供给制约。前体物之间还存在非线性化学耦合,单独大幅削减NOx有时反而推高臭氧与硝酸盐浓度。中国蓝天保卫战和欧盟国家减排承诺指令因此都转向多污染物协同、跨行政区联防联控的框架。
The three precursors sit in different sectors such as power, transport, and agriculture, so controlling any single industry cannot cut them in step; agricultural ammonia still lacks binding limits even though nitrate formation is frequently ammonia-limited. Nonlinear coupling among precursors means deep NOx cuts alone can push ozone and nitrate concentrations upward. China's Blue Sky Defense campaign and the EU National Emission Ceilings Directive both moved accordingly toward multi-pollutant, cross-jurisdiction coordination frameworks.
难度 专业 · 适合 高中(15-18)
CC BY 4.0 · 已核验 · Verified 2026-10-04
来源 · Source
Seinfeld 与 Pandis《Atmospheric Chemistry and Physics》；美国环境保护署臭氧生成敏感性技术文件
Seinfeld and Pandis, Atmospheric Chemistry and Physics; U.S. EPA technical documents on ozone formation sensitivity
独立核验依据 · Independent verification: 核验依据 1 ISBN 978-1-119-22117-3 (2006, Wiley)
#大气污染 #二次气溶胶
在VOC控制的臭氧生成敏感区单方面削减NOx,为什么短期内地表臭氧浓度可能不降反升?
In a VOC-limited ozone production regime, why can unilateral NOx reductions push surface ozone concentrations up rather than down in the short term?
高NOx环境中NO本身不断滴定消耗臭氧,VOC供给不足使自由基链式循环受限;削减NOx等于削弱这一化学汇,同时释放出的OH加速VOC氧化再生臭氧,净效果往往是浓度抬升。判别敏感区需依托甲醛与二氧化氮比值等指示剂并结合敏感性模拟。先协同压减VOC、再分阶段收紧NOx,方能避开转型期的反弹风险。
Under high-NOx conditions NO itself continuously titrates ozone away while scarce VOC constrains the radical chain; cutting NOx removes that chemical sink, and the freed OH radicals accelerate VOC oxidation that regenerates ozone, so the net effect is often higher concentrations. Identifying the regime rests on indicator ratios such as formaldehyde to nitrogen dioxide together with sensitivity modelling. Coordinated VOC cuts first and phased NOx tightening afterwards are what steer policy past the transitional rebound.
难度 专业 · 适合 高中(15-18)
CC BY 4.0 · 已核验 · Verified 2026-11-02
来源 · Source
S. Sillman, Atmospheric Environment, 1999(城市与污染乡村地区臭氧-NOx-VOC关系评述);X. Jin 等,GRL, 2017(HCHO/NO2比值判定臭氧生成敏感区的卫星验证)
S. Sillman, Atmospheric Environment, 1999, relation between ozone, NOx and hydrocarbons in urban and polluted rural environments; X. Jin et al., Geophysical Research Letters, 2017, satellite verification of HCHO/NO2 as an ozone sensitivity indicator.
独立核验依据 · Independent verification: 核验依据 1 CROSSREF 标识 10.1016/s1352-2310(98)00345-8：The relation b
#臭氧敏感区 #NOx滴定
平流层臭氧和地面臭氧有什么区别？
How do stratospheric ozone and ground-level ozone differ?
平流层里的臭氧层像保护伞挡住紫外线的伤害，需要保护；而地面臭氧是氮氧化物和挥发性有机物在阳光照射下生成的二次污染物，会刺激呼吸道、损害健康。
Stratospheric ozone forms a protective layer that blocks harmful ultraviolet rays and must be preserved. Ground-level ozone is a secondary pollutant made when nitrogen oxides and volatile organics react in sunlight, and it irritates the lungs.
难度 进阶 · 适合 初中(12-15)
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
左玉辉 主编,《环境学》第2版,高等教育出版社,2009
Zuo Yuhui ed., Environmental Science, 2nd ed., Higher Education Press, 2009
独立核验依据 · Independent verification: 核验依据 2 DOUBAN ISBN 标识 9787040283327（按标识回读: 环境学）
#臭氧层 #地面臭氧 #二次污染物
黑碳（soot）除了污染还有什么气候效应？
Besides pollution, what climate effect does black carbon have?
黑碳吸收阳光加热大气，沉降到雪冰表面会降低反照率加速融化，是仅次于CO2和甲烷的强短期增温因子，寿命仅数天到数周，因此削减黑碳是见效最快的降温措施之一。
Black carbon absorbs sunlight, warms the air, and darkens snow/ice to speed melting. It is the strongest short-lived warming agent after CO2 and methane, lasting days to weeks, so cutting it is among the fastest cooling measures available.
难度 进阶 · 适合 小学高段(9-12)
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
左玉辉 主编,《环境学》第2版,高等教育出版社,2009
Zuo Yuhui ed., Environmental Science, 2nd ed., Higher Education Press, 2009
独立核验依据 · Independent verification: 核验依据 2 DOUBAN ISBN 标识 9787040283327（按标识回读: 环境学）
#黑碳 #短期气候因子
《蒙特利尔议定书》针对的是什么问题，取得了什么成效？
What problem does the Montreal Protocol target, and what results has it achieved?
《蒙特利尔议定书》（1987）旨在逐步淘汰消耗臭氧层的物质，如氯氟烃（CFCs）和哈龙。得益于全球履约，平流层臭氧层空洞已停止扩大并缓慢恢复，预计中纬度地区臭氧可在2040年代、南极在2060年代前后恢复到1980年水平。
The Montreal Protocol (1987) aims to phase out ozone-depleting substances such as chlorofluorocarbons (CFCs) and halons. Thanks to global compliance, the stratospheric ozone hole has stopped growing and is slowly recovering; ozone over mid-latitudes is expected to return to 1980 levels in the 2040s and over Antarctica around the 2060s.
难度 进阶 · 适合 初中(12-15)
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
戴树桂 主编,《环境化学》第2版,高等教育出版社,2006
Dai Shugui ed., Environmental Chemistry, 2nd ed., Higher Education Press, 2006
独立核验依据 · Independent verification: 核验依据 2 DOUBAN ISBN 标识 9787040199567（按标识回读: 环境化学）
#蒙特利尔议定书 #臭氧层 #CFC #哈龙 #恢复
氮氧化物（NOx）主要来自哪里，会对环境和健康造成哪些影响？
Where do nitrogen oxides (NOx) mainly come from, and what impacts do they have?
氮氧化物主要由高温燃烧过程产生，尤其来自机动车、电厂和工业锅炉的化石燃料燃烧。它们会参与形成地面臭氧和细颗粒物（PM2.5），也是酸雨和富营养化的前体物，并可刺激呼吸道、加重哮喘等呼吸系统疾病。
Nitrogen oxides are produced mainly by high-temperature combustion, especially from vehicles, power plants, and industrial boilers burning fossil fuels. They contribute to ground-level ozone and fine particulate (PM2.5) formation, act as precursors to acid rain and eutrophication, and can irritate airways and worsen respiratory conditions such as asthma.
难度 进阶 · 适合 初中(12-15)
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
戴树桂 主编,《环境化学》第2版,高等教育出版社,2006
Dai Shugui ed., Environmental Chemistry, 2nd ed., Higher Education Press, 2006
独立核验依据 · Independent verification: 核验依据 2 DOUBAN ISBN 标识 9787040199567（按标识回读: 环境化学）
#氮氧化物 #燃烧 #地面臭氧 #酸雨 #呼吸道
臭氧污染（地面臭氧）和臭氧层空洞是两回事吗？
Is ground-level ozone pollution different from the ozone-hole problem?
完全不同。平流层臭氧层吸收紫外线的'好臭氧'因氟利昂等被破坏；地面臭氧是NOx与挥发性有机物在阳光下二次生成的'坏臭氧'，刺激呼吸道、损伤作物，属于光化学烟雾的核心成分。
They are unrelated. Stratospheric ozone shields UV and is depleted by CFCs—the 'good' ozone. Ground-level ozone is formed by sunlight reacting NOx with VOCs—a 'bad' ozone that irritates lungs and harms crops, central to photochemical smog.
难度 进阶 · 适合 初中(12-15)
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
左玉辉 主编,《环境学》第2版,高等教育出版社,2009
Zuo Yuhui ed., Environmental Science, 2nd ed., Higher Education Press, 2009
独立核验依据 · Independent verification: 核验依据 2 DOUBAN ISBN 标识 9787040283327（按标识回读: 环境学）
#地面臭氧 #光化学烟雾
冬季重污染过程中,PM2.5中硫酸盐、硝酸盐、铵盐等二次组分的占比为什么会明显升高?
During winter haze episodes, why does the share of secondary components such as sulfate, nitrate and ammonium in PM2.5 rise markedly?
静稳天气压缩了边界层并抬高湿度,SO2与NOx在颗粒物表面的多相化学反应随之加快。高湿还促进硝酸盐经液相途径生成并抑制其挥发,使二次无机盐成为PM2.5的主要增量来源。弱通风条件则让已生成的二次气溶胶持续累积而难以清除。
Stagnant winter conditions compress the boundary layer and raise humidity, accelerating multiphase conversion of SO2 and NOx on particle surfaces. High humidity also favours aqueous-phase nitrate formation and suppresses its volatilization, making secondary inorganic salts the dominant increment in PM2.5. Weak ventilation lets the accumulated secondary aerosol build up faster than it can be removed.
难度 进阶 · 适合 初中(12-15)
CC BY 4.0 · 已核验 · Verified 2026-11-04
来源 · Source
Cheng, Zheng, Wei, Mu,《Reactive nitrogen chemistry in aerosol water as a source of sulfate during haze events in China》,Science Advances,2016 (DOI: 10.1126/sciadv.1601530)
Cheng, Zheng, Wei, Mu, 'Reactive nitrogen chemistry in aerosol water as a source of sulfate during haze events in China', Science Advances, 2016, DOI: 10.1126/sciadv.1601530
独立核验依据 · Independent verification: 核验依据 1 Crossref DOI 10.1126/sciadv.1601530
#二次气溶胶 #静稳天气
廉价光学 PM2.5 传感器的读数为什么必须用参比站数据校正后才能用?
Why do readings from low-cost optical PM2.5 sensors need calibration against reference-station data before they can be used?
这类传感器靠激光散射推算质量浓度,而散射信号受粒径谱、相对湿度和气溶胶成分影响很大,高湿时吸湿性颗粒物可被高估数倍。通行做法是与 TEOM 或 β 射线法等参比仪器做回归,并按季节或站点重新拟合。校正之后,密集组网才能提供城市尺度的空间差异信息。
These sensors infer mass concentration from laser light scattering, a signal strongly affected by the particle size distribution, relative humidity, and aerosol composition; hygroscopic particles can be overestimated several-fold when the air is humid. Standard practice is a regression against reference instruments such as TEOM or beta-attenuation monitors, refitted by season or site. Only after calibration can a dense sensor network resolve real urban-scale spatial contrasts.
难度 进阶 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-11-04
来源 · Source
Barkjohn, Gantt & Clements,《Development and application of a United States-wide correction for PM 2.5 data collected with the PurpleAir sensor》,Atmospheric Measurement Techniques,2021 (DOI: 10.5194/amt-14-4617-2021)
Barkjohn, Gantt & Clements, 'Development and application of a United States-wide correction for PM 2.5 data collected with the PurpleAir sensor', Atmospheric Measurement Techniques, 2021, DOI: 10.5194/amt-14-4617-2021
独立核验依据 · Independent verification: 核验依据 1 Crossref DOI 10.5194/amt-14-4617-2021
#环境监测 #光学颗粒物传感器
1979年的《长程越境空气污染公约》依靠什么机制化解了欧洲的酸雨争端?“临界负荷”概念的引入又改变了什么?
What mechanisms let the 1979 Convention on Long-Range Transboundary Air Pollution defuse Europe's acid-rain disputes, and what changed once 'critical loads' were introduced?
该公约在联合国欧洲经济委员会框架下签署,首次把越境大气污染确立为有约束力的国际法律义务,并配套EMEP联合监测与模拟计划,使各国排放清单和沉降数据能够互相校核。1994年奥斯陆议定书引入“临界负荷”,按生态系统对酸沉降的真实敏感度分配削减义务,取代了过去一刀切的百分比减排。这种把联合科学与条约谈判绑定的模式,后来被汞问题谈判以及东亚酸沉降监测合作所借鉴。
Signed under the UN Economic Commission for Europe, the convention first made transboundary air pollution a binding international legal obligation and attached the EMEP programme, whose joint monitoring and modeling let national emission inventories and deposition data be checked against each other. The 1994 Oslo Protocol then brought in critical loads, assigning reduction duties according to how sensitive each ecosystem actually is to acid deposition instead of uniform percentage cuts. Binding joint science to treaty negotiation in this way later informed the mercury negotiations and cooperative acid-deposition monitoring in East Asia.
难度 进阶 · 适合 大众
CC BY 4.0 · 来源待核验 · Source pending review
来源 · Source
出处备注：此条未指向带版次的可引用著作（通识性内容、机构文件或未展开的英文书名），本库不提供独立书目出处；如需精确引用，需由编辑补全具体篇目与版次。
Sliggers & Kakebeeke (eds.) 2004, Clearing the Air: 25 Years of the Convention on Long-Range Transboundary Air Pollution, UNECE, Geneva; EMEP Status Report 1/2004
Sliggers & Kakebeeke (eds.) 2004, Clearing the Air: 25 Years of CLRTAP, UNECE, Geneva; EMEP Status Report 1/2004
#越境大气污染 #临界负荷
什么是“PM2.5”，为什么它比粗颗粒物更危险？
What is PM2.5, and why is it more dangerous than coarser particles?
PM2.5指空气动力学直径不大于2.5微米的细颗粒物，来源包括燃烧、机动车尾气和工业排放。它们能深入肺部甚至进入血液，与心血管疾病、肺癌和过早死亡风险上升相关，因此世界卫生组织为其设定了严格的年均指导值（5 μg/m³）。
PM2.5 refers to fine particulate matter with an aerodynamic diameter of 2.5 micrometers or less, arising from combustion, vehicle exhaust, and industrial emissions. These particles penetrate deep into the lungs and can enter the bloodstream, linked to higher risks of heart disease, lung cancer, and premature death, which is why the WHO sets a strict annual guideline of 5 μg/m³.
难度 进阶 · 适合 初中(12-15)
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
戴树桂 主编,《环境化学》第2版,高等教育出版社,2006
Dai Shugui ed., Environmental Chemistry, 2nd ed., Higher Education Press, 2006
独立核验依据 · Independent verification: 核验依据 2 DOUBAN ISBN 标识 9787040199567（按标识回读: 环境化学）
#PM2.5 #细颗粒物 #颗粒物 #世界卫生组织 #年均指导值
酸雨是怎么形成的，它伤害了什么？
How does acid rain form and what does it harm?
燃煤与工业排放的SO2、NOx在大气中氧化成硫酸与硝酸，随雨降落使水体与土壤酸化，导致湖泊鱼群死亡、森林衰退、石材建筑腐蚀。我国经脱硫脱硝后酸雨频率已明显下降。
SO2 and NOx from coal and industry oxidize into sulfuric and nitric acid that fall as rain, acidifying lakes and soils and killing fish, damaging forests, and corroding stone buildings. China's desulfurization and denitrification have greatly reduced its frequency.
难度 进阶 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
左玉辉 主编,《环境学》第2版,高等教育出版社,2009
Zuo Yuhui ed., Environmental Science, 2nd ed., Higher Education Press, 2009
独立核验依据 · Independent verification: 核验依据 2 DOUBAN ISBN 标识 9787040283327（按标识回读: 环境学）
#酸雨 #脱硫脱硝
在家里做饭和取暖，为什么也会产生空气污染？
Why can cooking and heating at home also cause air pollution?
在通风不好的屋里用煤、木柴或秸秆等固体燃料做饭取暖，会释放大量烟尘和一氧化碳。世界卫生组织估计，全球有数十亿人仍暴露在这种室内污染中，容易引发肺病和心脏病。
Burning coal, wood or crop residues for cooking and heating in poorly ventilated homes releases heavy smoke and carbon monoxide. The WHO estimates billions of people are still exposed to this indoor pollution, raising risks of lung and heart disease.
难度 入门 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
左玉辉 主编,《环境学》第2版,高等教育出版社,2009
Zuo Yuhui ed., Environmental Science, 2nd ed., Higher Education Press, 2009
独立核验依据 · Independent verification: 核验依据 2 DOUBAN ISBN 标识 9787040283327（按标识回读: 环境学）
#室内空气污染 #固体燃料 #健康
雾霾天为什么要关注NOx？
Why watch NOx on haze days?
NOx（氮氧化物）来自燃煤、汽车尾气，是PM2.5和地面臭氧的共同前体物，还参与硝酸盐颗粒生成。控制NOx能同时缓解雾霾与臭氧污染，是协同治理的关键。
NOx from coal burning and vehicles is a shared precursor of both PM2.5 and ground ozone, and feeds nitrate-particle formation. Cutting NOx eases haze and ozone together—a key co-benefit.
难度 入门 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
左玉辉 主编,《环境学》第2版,高等教育出版社,2009
Zuo Yuhui ed., Environmental Science, 2nd ed., Higher Education Press, 2009
独立核验依据 · Independent verification: 核验依据 2 DOUBAN ISBN 标识 9787040283327（按标识回读: 环境学）
#氮氧化物 #协同治理
什么是“雾霾（smog）”，它通常有哪两种主要类型？
What is smog, and what are its two main types?
雾霾是空气中污染物与雾或水汽混合形成的可见污染层，主要有两种类型：传统“煤烟型”雾霾（以二氧化硫和烟尘为主）和“光化学烟雾”（阳光促使氮氧化物与挥发性有机物反应生成臭氧等）。光化学烟雾在阳光强的城市夏季尤为常见。
Smog is a visible layer of pollution formed when air pollutants mix with fog or water vapor, and it has two main types: classic 'coal' smog (dominated by sulfur dioxide and soot) and photochemical smog (formed when sunlight drives reactions among nitrogen oxides and volatile organic compounds to produce ozone). Photochemical smog is especially common in sunny cities during summer.
难度 入门 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-11-03
来源 · Source
美国环保署（EPA）国家环境空气质量标准（NAAQS）对臭氧与颗粒物的界定；美国环保署（EPA）《臭氧及相关光化学氧化剂空气污染物标准》
U.S. Environmental Protection Agency (EPA), National Ambient Air Quality Standards (NAAQS) for ozone and particulate matter; EPA 'Air Quality Criteria for Ozone and Related Photochemical Oxidants'
独立核验依据 · Independent verification: 核验依据 1 OPENLIBRARY 标识 /works/OL23626296W：Air quality criteria f
#雾霾 #煤烟型 #光化学烟雾 #臭氧 #氮氧化物
PM2.5为什么比普通灰尘更危险？
Why is PM2.5 more dangerous than ordinary dust?
PM2.5指空气动力学直径≤2.5微米的颗粒物，可深入肺泡并进入血液，携带重金属、多环芳烃等毒物，与心肺疾病、卒中直接相关，而较大颗粒多被鼻腔阻挡。
PM2.5 particles are ≤2.5 micrometers wide; they penetrate deep into alveoli and enter the bloodstream, carrying heavy metals and PAHs linked to heart and lung disease and stroke, whereas larger dust is mostly trapped by the nose.
难度 入门 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
左玉辉 主编,《环境学》第2版,高等教育出版社,2009
Zuo Yuhui ed., Environmental Science, 2nd ed., Higher Education Press, 2009
独立核验依据 · Independent verification: 核验依据 2 DOUBAN ISBN 标识 9787040283327（按标识回读: 环境学）
#PM2.5 #细颗粒物
为什么戴口罩能帮我们少吸脏空气？
Why do masks help us breathe less dirty air?
口罩里的细密滤网能挡住灰尘和很小的脏颗粒，让进到鼻子和肺里的脏东西变少，保护我们的身体。
The fine filter in a mask blocks dust and tiny dirty particles, so fewer of them reach your nose and lungs and your body stays safer.
难度 入门 · 适合 幼儿(3-6)
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
左玉辉 主编,《环境学》第2版,高等教育出版社,2009
Zuo Yuhui ed., Environmental Science, 2nd ed., Higher Education Press, 2009
独立核验依据 · Independent verification: 核验依据 2 DOUBAN ISBN 标识 9787040283327（按标识回读: 环境学）
#口罩 #保护
为什么说大树是城市里的「吸尘器」?
Why are trees called the city's vacuum cleaners?
树叶上毛茸茸的,还能吞下空气里的小灰尘;树吸进二氧化碳,呼出我们需要的氧气。一棵大树就像一台安静的巨大空气净化器,还不用电!
Fuzzy leaves catch dust from the air. Trees breathe in carbon dioxide and puff out the oxygen we need. One big tree is a quiet giant air purifier that never needs electricity!
难度 入门 · 适合 幼儿(3-6)
CC BY 4.0 · 已核验 · Verified 2026-10-03 · 2 条独立证据
来源 · Source
韩启德总主编《十万个为什么》(第六版),少年儿童出版社,2013
Han Qide chief ed., Ten Thousand Whys, 6th edition, Juvenile and Children Publishing House, 2013, 6th ed., Juvenile and Children Publishing House, 2013
独立核验依据 · Independent verification: 核验依据 1 ISBN 978-7-5324-9328-9 · 核验依据 2 ISBN 9787532493289
#大树 #净化空气 #氧气
酸雨是怎么产生的？
How does acid rain form?
工厂和汽车排放的二氧化硫、氮氧化物在大气中氧化后，与水汽结合生成硫酸和硝酸，随雨雪落到地面形成酸雨。它会酸化湖泊土壤、腐蚀建筑和伤害森林。
Sulfur dioxide and nitrogen oxides from industry and vehicles oxidize in the air and combine with moisture to form sulfuric and nitric acids that fall as acid rain. It acidifies lakes and soils, damages buildings and harms forests.
难度 入门 · 适合 小学低段(6-8)
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
左玉辉 主编,《环境学》第2版,高等教育出版社,2009
Zuo Yuhui ed., Environmental Science, 2nd ed., Higher Education Press, 2009
独立核验依据 · Independent verification: 核验依据 2 DOUBAN ISBN 标识 9787040283327（按标识回读: 环境学）
#酸雨 #二氧化硫 #氮氧化物