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Fav十万个为什么
什么是光化学烟雾？
光化学烟雾是阳光作用下，氮氧化物和挥发性有机化合物发生光化学反应生成的有害混合物，具体原因如下：
1、氮氧化物和挥发性有机化合物的排放：汽车尾气和工业废气排放出氮氧化物（NOx）和挥发性有机化合物（VOCs），这些物质是光化学烟雾的前体物。
2、阳光（尤其是紫外光）的参与：在阳光照射下，这些前体物发生一系列光化学反应，生成臭氧（O3）、过氧乙酰硝酸酯（PAN）等二次污染物。
3、光化学反应的复杂过程：光化学反应使大气氧化性增强，形成包含臭氧、醛类、酮类等多种有害物质的混合体，最终形成光化学烟雾。
总结：光化学烟雾是阳光作用下，氮氧化物和挥发性有机化合物发生光化学反应生成的有害混合物。
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