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A pollutant is any substance, chemical or other factor that changes

A. natural geochemical cycles

B. the natural flora of a place

C. the natural wild life of a region

D. the natural balance of our environment

Please do not use chat terms. Example: avoid using "grt" instead of "great".

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  1. Primary treatment of sewage means
  2. Autumn colouration of leaves appears only in
  3. An American plant which had become a troublesome weed in India is
  4. Competition for food, light and space is most severe in
  5. Vegetation in Delhi is predominantly
  6. Which one of the following is associated with the conservation of forest ?
  7. Which of the following functions performed by forests help most in controlling drought
  8. Which is the correct food chain
  9. Desert plants are generally
  10. Mark which is true
  11. What will happen if our water resources are continued to be polluted by industrial wastes
  12. In grassland ecosystem the pyramid of energy is
  13. Carbon cycle includes
  14. The ultimate source of energy for fish is
  15. First link in any food chain is green plant because
  16. In cities like Mumbai and Delhi, the major air pollutants are
  17. The least porous soil among the following is
  18. Hydrilla is a
  19. Smog is a common pollutant in places having
  20. When young plants are grazed too heavily they get killed because
  21. An area of soil is thoroughly wetted and allowed to drain until capillary movement of water is stopped.…
  22. The nitrifying bacteria which oxidise nitrite to nitrates include
  23. Commensalism is
  24. Hie sequence blue green algae > crustose lichens foliose lichens > mosses shrubs dicotyledonous…
  25. Laterization is a process which results in the
  26. Water plants usually have
  27. Hie earliest settlers on barren lands are generally
  28. Increasing accumulation of DDT in organisms of a food chain in higher trophic levels is known as
  29. Plankton, Nekton and Itenthon are not the components of one of the following ecosystems:
  30. Deforestation may reduce the chances of