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Massive demolition exercise in Noida

  • Published
    29th Aug, 2022
Context

The demolition of the Supertech Twin towers (Noida) using controlled implosion has highlighted the need for interventions to mitigate pollution and waste, post-demolition.

About
  • The demolition was done by a method known as the ‘waterfall technique’ to minimize damage to the surroundings.
  • The waterfall technique means that the debris will fall like water. Implosion is the method used for such urban demolitions which need controlled detonations.
  • An explosion, on the contrary, would result in debris being flung far across directions.

Areas of concern:

  • Dust: This demolition has produced large amounts of dust. The dust and gases will get diluted in the air and will get dispersed.
  • Particulate Matter: Heavier dust particles will settle down soon but the light particulate matter (PM) will probably remain in the air for weeks.
  • Environmental concerns: Demolition causes lots of environmental degradation, like
    • impact on the ground (shock waves) in case of demolition by the blast
    • noise pollution
    • spread of fine particles in the air
  • Health hazards: Health concerns related to respiratory issues, skin ailments, as well as allergic disorders can come up with the people living in the vicinity.
    • There is an increase in lead, silica, and asbestos in the atmosphere and a tremendous amount of PM10 and PM2.5 particles.
    • Increased lead exposure may lead to headaches, tiredness, irritability and constipation, silicosis, etc.
    • Silt accumulation in drainage systems can lead to problems like water-borne and parasite diseases.
Air Quality: The Air Quality Index (AQI) bulletin issued by the Central Pollution Control Board mentioned Noida’s AQI to be at 120. This is considered to be ‘moderate’.
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