Q. Microbeads, often discussed in the context of environmental pollution, are of concern because:

[A] They can accumulate in marine ecosystems, causing harm to aquatic life.

[B] They are widely used as a colouring agent in packaged food products.

[C] They are known to cause respiratory infections in humans when inhaled.

[D] They are essential components of synthetic fertilizers.

Answer: A
Notes:

Explanation:

  • Microbeads are tiny plastic particles (less than 5 mm) used in cosmetics, toothpaste, face scrubs, and personal care products.
  • When washed down drains, they pass through sewage treatment plants and enter rivers, lakes, and oceans.
  • They persist in the environment, are ingested by fish and other marine organisms, and can enter the food chain.
  • Main concern: Marine ecosystem damage and potential health impacts due to bioaccumulation of toxins attached to microplastics.

Source: Environment (N.C.E.R.T)

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