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प्रश्न
How are CFCs harmful?
उत्तर
CFCs refer to chlorofluorocarbons. They are generally used as aerosol propellants, refrigerants, shaving foams, spraying agent in scents, etc. They are very harmful, as they are types of ODS (ozone-depleting substances) that lead to the destruction or depletion of the ozone layer of the atmosphere.
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संबंधित प्रश्न
The prime source of chlorofluorocarbons is ______.
With the help of a flow diagram, describe how energy from the sun flows through various trophic levels.
How is ozone formed in the higher level of atmosphere?
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 |
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.
‘There is a hole in the ozone layer’. What do you understand by this?
The chemicals leading to the formation of ozone holes.
True or False:
Ozone in the Troposphere is a harmful pollutant.
Enumerate methods of protecting the ozone layer and preventing its depletion.
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 ______.
