Question

Which one of the following is a bio indicator of air pollution?
1. Fern
2. Lichen
3. Money plant
4. Dodder

Answer 1

Correct Answer - Option 2 : Lichen

The correct answer is Lichen.

• Bio Indicators:- 
  • ​Lichens serve as good bio-indicators for air pollution. In the variety of pH around 6.0, several animals, those are important food items for the fish decline.
  • These include freshwater shrimp, crayfish, snails, and some small mussels.

• Tree Ferns:
  • Distribution: Lower elevations in and surrounding the Himalayas.
  • Uses: The Soft Tree Fern can be used as a food source, with the pith of the plant being eaten either cooked or raw. It is a good source of starch. 

• Steps were taken by the Indian Government to control air pollution:
  • Formulation of a Comprehensive Policy for Abatement of Pollution.
  • Supply of improved auto–fuel.
  • Tightening of vehicular and industrial emission norms.
  • Mandatory environmental clearance for specified industries.
  • Management of municipal, hazardous and bio-medical wastes.
  • Promotion of cleaner technologies.
  • Strengthening the network of air quality monitoring stations.
  • Assessment of pollution load.
  • Source apportionment studies.
  • Preparation and implementation of action plans for major cities & critically polluted areas.