Which of the following is normally not at atmospheric pollutant

A. CO    

B. so2

C. co2

D.  Hydrocarbons

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

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  1. One of these is a renewable source of energy:
  2. Which of the following functions performed by forests help most in controlling drought
  3. The source of energy in the ecosystem is:
  4. Biosphere is:
  5. What will happen if our water resources are continued to be polluted by industrial wastes
  6. An area of soil is thoroughly wetted and allowed to drain until capillary movement of water is stopped.…
  7. The food chain in which microorganisms break down the energy-rich compounds synthesized by producers…
  8. An American plant which had become a troublesome weed in India is
  9. Carbon cycle includes
  10. Autumn colouration of leaves appears only in
  11. The nitrifying bacteria which oxidise nitrite to nitrates include
  12. In grassland ecosystem the pyramid of energy is
  13. Mark which is true
  14. What is the major constituent of biomass of an organism
  15. . Biome is
  16. Hie earliest settlers on barren lands are generally
  17. Primary treatment of sewage means
  18. A pollutant is any substance, chemical or other factor that changes
  19. Deforestation may reduce the chances of
  20. Humus is an example of
  21. Desert plants are generally
  22. Commensalism is
  23. Plankton, Nekton and Itenthon are not the components of one of the following ecosystems:
  24. Hydrilla is a
  25. Tropical evergreen forests are seen in
  26. Correct definition of ecosystem is :
  27. Increasing accumulation of DDT in organisms of a food chain in higher trophic levels is known as
  28. When young plants are grazed too heavily they get killed because
  29. First link in any food chain is green plant because
  30. Which one of the following is associated with the conservation of forest ?