SMOG

=S M O G =



What is Smog??? Smog can be defined as a kind of air pollution associated with various pollutants. The most notable kind of smog, is photochemical smog, it produces a kind of 'pea soup' colour. Photochemical's include nitrogen oxides, volatile organic compounds (VOC), these are emitted mainly from combustion. The cause a yellowish, brown colour.

There are two types of Smog, Photochemical smog and Industrial Smog. traps smog || Sunlight causes secondary pollutants ||
 * || Industrial Smog || Photochemical Smog ||
 * Source || Burning Coal, Oil || Automobile Exhausts ||
 * Conditions || Cold / Wet Winter Weather Thermal Inversion
 * Main Pollutants || Sulfur Oxides, Particulates, Sulfuric Acids || Nitrogen Oxides, Ozone, Alkanals, peroxycayl ||
 * Effects || Breathing difficulties, Damage to to vegetation, Corrosion of Metals || Effects on humans, and vegetation, causes acid rain, and damages vegetable, aquatic life ||
 * Reduction || Alkaline scrubbes to reduce sulfur dioxide || Catalytic Converters, lean burning engines ||

Primary: nitrogen oxides, VOCs Secondary : Hydroxyl Radicals, Nitric Acid, peroxidie radical.



 When the secondary pollutants reacts with unburnt hydrocarbons, it forms RCHO ALDEHYDES which is a MIST and reduces visibility.

Also, nitrogen dioxide can also react with hydrocarbon free radicals producing compounds called (PANS). PANS stands for PEROXYACYLNITRATES. These can cause irritation to eyes, respiratory systems and can be toxic to plants.