UPSC Previous Year Question | Prelims GS | 2020

In rural road construction, the use of which of the following is preferred for ensuring environmental sustainability or to reduce carbon footprint? 1. Copper slag 2. Cold mix asphalt technology 3. Geotextiles 4. Hot mix asphalt technology 5. Portland cement

  1. 1, 2 and 3 only
  2. 2, 3 and 4 only
  3. 4 and 5 only
  4. 1 and 5 only

Answer

Correct Answer

1, 2 and 3 only

Explanation

Green rural road construction (PMGSY) favours industrial-waste aggregates like copper slag, cold mix asphalt (which needs no heating) and geotextiles. Hot mix asphalt and Portland cement are energy- and carbon-intensive.

Topics: climate change & sustainable development, environment & ecology, green infrastructure, green technologies in rural road construction (pmgsy)