What is Smog and how it can be less?

Khuda ki basti: Lahore is one of most polluted city in the world due to smog. According to Air quality Index smog ratio in Lahore is 273 AQI which is very unhealthy. After Lahore Sahiwal is second most polluted city of Pakistan smog ratio in Sahiwal is 256 AQI.
Smog is air pollution that reduces visibility. The term “smog” was first used in the early 1900s to describe a mix of smoke and fog. The smoke usually came from burning coal. Smog was common in industrial areas, and remains a familiar sight in cities today.

At least two distinct types of smog are recognized: sulfurous smog and photochemical smog. Sulfurous smog, which is also called “London smog,” results from a high concentration of sulfur oxides in the air and is caused by the use of sulfur-bearing fossil fuels, particularly coal. This type of smog is aggravated by dampness and a high concentration of suspended particulate matter in the air.

Photochemical smog, which is also known as “Los Angeles smog,” occurs most prominently in urban areas that have large numbers of automobiles. It requires neither smoke nor fog. This type of smog has its origin in the nitrogen oxides and hydrocarbon vapors emitted by automobiles and other sources, which then undergo photochemical reactions in the lower atmosphere. The highly toxic gas ozone arises from the reaction of nitrogen oxides with hydrocarbon vapors in the presence of sunlight, and some nitrogen dioxide is produced from the reaction of nitrogen oxide with sunlight. The resulting smog causes a light brownish coloration of the atmosphere, reduced visibility, plant damage, irritation of the eyes, and respiratory distress.

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Smog In Lahore

How It can reduce:
Smog is still a problem in many cities of the world. Everyone can do their part to reduce smog by changing a few behaviors, such as:
Drive less, Do Walk, Use bike, carpool, and use public transportation whenever possible.
Take care of cars, Getting regular tune-ups, changing oil on schedule, and inflating tires to the proper level can improve gas mileage and reduce emissions.
Fuel up during the cooler hours of the day—night or early morning. This prevents gas fumes from heating up and producing ozone.
Avoid products that release high levels of VOCs. For example, use low-VOC paints.
Avoid gas-powered yard equipment, like lawn mowers. Use electric appliances instead.

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