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Date: 8-2-2019
1354
Date: 8-2-2019
1183
Date: 8-2-2019
1295
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At normal temperatures the oxygen and nitrogen gases do not react together. In the presence of very high temperatures nitrogen and oxygen do react together to form nitric oxide. These conditions are found in the combustion of coal and oil at electric power plants, and also during the combustion of gasoline in automobiles. Both of these sources contribute about equally to the formation of nitrogen oxides.
In areas of high automobile traffic, such as in large cities, the amount of nitrogen oxides emitted into the atmosphere can be quite significant. In the Los Angeles area, the main source of acid rain is from automobiles. In certain national parks such as Yosemite and Sequoia, automobile traffic is banned to limit the amount of air pollution damage to the trees and plants. This also has the effect of reducing the visual smog in the air.
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دراسة: وقت ممارسة الرياضة مهم لفقدان الوزن
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ما مدى خطورة الاضطراب الجوي أثناء الطيران؟
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في السيرة النبوية قسم الشؤون الفكرية يدعو للاشتراك في مسابقة أفضل قصة قصيرة
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أكثر من عشرة آلاف طالب يشاركون في الدورات القرآنية الصيفية ببغداد
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في قضاء الهندية المجمع العلمي يحيي ولادة الإمام الرضا (عليه السلام) بمحفل قرآني
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بعد إعلانه دعوة المشاركة مجمع العفاف النسوي يشهد إقبالًا واسعًا للمشاركة في معرضه التسويقي
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