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CBSE Gujarat Board Haryana Board

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Class 10 Class 12

World summit on sustainable development (2002) was held in 

  • Brazil

  • Sweden

  • Argentina

  • South Africa


D.

South Africa

In 1992 world leaders convened an Earth Summit in Rio de Janeiro,Brazil, in search of international agreements that could help save the world from pollution, poverty and the waste or resource.Another earth summit was convened from 26 August to 4 September a 2002 in Johannesburg, South Africa. Negotiators for 191 countries agreed on an  action plan to alleviate poverty and conserve the natural resource of earth.

In 1992 world leaders convened an Earth Summit in Rio de Janeiro,Brazil, in search of international agreements that could help save the world from pollution, poverty and the waste or resource.Another earth summit was convened from 26 August to 4 September a 2002 in Johannesburg, South Africa. Negotiators for 191 countries agreed on an  action plan to alleviate poverty and conserve the natural resource of earth.


The meaning of BOD is :
  • Bacterial oxygen demand
  • Biological optimum density
  • Biochemical oxygen demand
  • Bioorganisation decay

C.

Biochemical oxygen demand

Ozone depletion will cause :
  • Forest fire
  • Pneumonia
  • Increased incidence of skin cancer
  • None of these

C.

Increased incidence of skin cancer

Which of the following pollutants is not produced by exhaust of motor vehicles ?
  • CO
  • Hydrocarbon
  • Fly-ash
  • NO

C.

Fly-ash

In the scrubber in the electrostatic precipitator the gases are passed through :
  • filter
  • lime
  • spray of water
  • both 2 and 3

D.

both 2 and 3

What is the term for the inflammation of cornea due to high absorption of UV-B radiation :
  • myopia
  • snow blindness
  • biomagnification
  • None of the above

B.

snow blindness