Haze

Haze is a phenomenon caused by small particles suspended in the air, typically dust, smoke, and other dry particles obscure the clarity of the sky. The World Health Organization (WHO) defines haze as an air quality index (AQI) greater than or equal to 200.

Causes

Haze often occurs when dust and smoke particles accumulate in relatively dry air. When weather conditions block the dispersal of smoke and other pollutants they concentrate and form a usually low-hanging shroud that impairs visibility and may become a respiratory health threat. Industrial pollution can result in dense haze, which is known as smog.

Effects

Haze has been a major problem in many parts of the world. It has severe health effects and can cause deadly diseases like lung cancer and heart diseases. The elderly, children, and people with chronic illnesses are especially vulnerable to haze.

Prevention

Prevention of haze involves controlling the sources of pollutants. This can be achieved by implementing stricter emission standards for vehicles and industries, promoting the use of cleaner sources of energy, and improving waste management practices.

See also

• Air pollution
• Smog
• Air Quality Index
• World Health Organization

References

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