Loss of forests, urbanization, increasing pollution are all due to:

Related Mcqs:

1. The air pollution caused by phosphate fertilizer factories is due to:The air pollution caused by phosphate fertilizer factories is due to:

   A. Phosphene
   B. SiF4
   C. Dust
   D. Halogens

2. These are generally, but not always, developed above the birch zone and in patches, sometimes extensive, within it, probably conditioned by edaphic and biotic factors, in Kashmir, Gilgit, Chitral and Hazara. This type ascends normally to ______ or more above the sub-alpine forests and climate must be similar but more severe than in sub-alpine forests:

   A. 140 m
   B. 150 m
   C. 160 m
   D. 170 m

3. The most striking difference between tropical rain forests and temperate forests is that:

   A. The tropical rain forests have preponderance of angiosperms while the temperate ones have preponderance of gymnosperms
   B. The trees of temperate forests are taller than these of tropical rain forests
   C. Plants of temperate forests are comparatively more mesophytic
   D. Tropical forests are comparatively homogenous

4. Depth of snowfall varies from ________ increasing with elevation in case of dry temperate forests:

   A. 1.4 to 6.0 m
   B. 1.5 to 7.0 m
   C. 1.6 to 8.0 m
   D. None of these

5. Positive pollution of soil is due to:

   A. Excess use of fertilizers
   B. Addition of wastes on soil
   C. Reduction in soil productivity
   D. All of these

6. In big cities, air pollution is mainly due to:

   A. Burning of fossil fuel
   B. Thermal power plants
   C. Sewage
   D. Suspended particles

7. Maximum noise pollution in residential areas is due to:

   A. Traffic sirens
   B. Sirens and loud speakers
   C. Kitchen appliances, radio and TV
   D. Industries

8. In 1970, several people died in Japan due to pollution of:

   A. Barium
   B. Cadmium
   C. Iron
   D. Mercury

9. The ground water pollution is due to excess of:

   A. DDT is a growth retardant
   B. Pesticides
   C. Minerals
   D. Carbon deposit

10. Thermal pollution in water bodies is caused due to discharge of:

    A. Hot water from power plants
    B. Hot chemicals from industries
    C. Waste from mines
    D. Waste from agricultural fields