Consider the following statements regarding per-and Polyfluorinated Substances (PFAS)

1. They are naturally occurring substances used in coatings of products that resist heat, oil, stains, grease, and water.
2. These substances break down easily in the environment and are an alternate to the conventional coating materials.

Select the correct statement.

Both statements are incorrect.
Per-and Polyfluorinated Substances (PFAS)

• They are hazardous man-made chemicals that spread globally in the atmosphere.
• They are used to make fluoropolymer coatings that can resist heat, oil, stains, grease and water.
• Products that use PFAs include clothing, furniture, adhesives, food packaging, non-stick cooking surfaces and electrical wire insulation.

Many PFAS, including perfluorooctane sulfonic acid (PFOS) and perfluorooctanoic acid (PFOA), are a concern because they:

• do not break down in the environment,
• can move through soils and contaminate drinking water sources,
• Build-up (bio accumulate) in fish and wildlife.

As a result of their proliferation, they pollute even the most remote regions of Earth.

• The PFA levels in the rainwater are above the prescribed levels all across the world.
• This phenomenon is especially problematic in a country like India, with a long history of rainwater harvesting.

Hence option 4th is correct.

By: Shubham Tiwari