Advertisements
Advertisements
प्रश्न
The following picture depicts a certain phenomenon
- Name the phenomenon and explain it.
- Enlist the sources that are responsible for the above mentioned phenomenon.
- List out the effects of the above phenomenon on humans.
Advertisements
उत्तर
- The above phenomenon is the depletion of the Ozone Layer. Ozone layer depletion is a phenomenon in which certain gaseous compounds, such as chlorofluorocarbons (CFCs), break down into chlorine atoms, which in turn break down ozone (O3) into oxygen (O2) and O.
-
- Use of CFCs in fire extinguishers and aerosol sprayers.
- Use of CFCs in refrigerators.
- Packing material styrofoam.
-
- Depletion of the ozone layer can affect global rainfall, cause ecological disruptions, and reduce world food supplies.
- The depletion of the ozone layer allows UV radiation to reach the planet. UV radiation can cause skin cancer and harm to the eyes and immune system.
APPEARS IN
संबंधित प्रश्न
The prime source of chlorofluorocarbons is ______.
Fill in the following blank with suitable word :
Ultraviolet rays can cause skin..............
Explain how, harmful ultraviolet radiations of sunlight are prevented from reaching the earth's surface.
With the help of a flow diagram, describe how energy from the sun flows through various trophic levels.
What step has been taken by UNEP in 1987 to prevent too much damage to the ozone layer?
“Damage to the ozone layer is a cause of concern”. Justify this statement.
Match the items in column I with the closely related ones in column II.
| Column l | Column lI | ||
| (i) | Chlorofluorocarbons (CFCs) | (a) | Global warming |
| (ii) | Fly ash | (b) | Biodegradable |
| (iii) | Cow dung | (c) | Nuclear radiation pollutant |
| (iv) | CO2 and methane | (d) | Acid rain |
| (v) | Sulphur dioxide | (e) | Industrial waste |
| (vi) | Iodine-131 | (f) | Ozone depletion |
Describe the methods of saving the ozone layer.
Which spectrum of the light harmful to organism: ____________.
In 1987, an agreement was formulated by the United Nations Environment Programme (UNEP) to freeze the production of “X” to prevent the depletion of “Y”. “X” and “Y” respectively referred to here are ______.
