Question

Which of the following is a recently originated problem of the environment?

• A. Ozone layer depletion
• B. Green house effect
• C. Global warming
• D. All of the above

Answer 1

The correct option is D

All of the above

The correct answer is D

The explanation for the correct answer:

Option A:

1. The depletion or reduction in the ozone layer is caused due to the use of various ozone-depleting substances by human beings.
2. These include Chlorofluorocarbons (CFCs), carbon tetrachloride, methyl chloroform, methyl bromide, nitrogen oxides, halogens, etc.
3. CFCs combine with ozone and form oxygen, thus depleting the ozone layer and allowing penetration of the harmful ultraviolet solar rays.

Option B:

1. The greenhouse effect refers to the change in temperature of the Earth due to the presence of an atmosphere containing gases that absorb and emit infrared radiation.
2. Greenhouse gases include water vapor, carbon dioxide, Chlorofluorocarbons, Ozone, and methane.

Option C:

1. The phenomenon of the gradual rise in the temperature of the earth due to the high amount of emission of greenhouse gasses, deforestation, burning of fossil fuels, and exposure to chlorofluorocarbons.
2. This is leading to climate changes, rise in global water levels, melting of polar ice-caps, etc.

Final answer: A correct answer is an option (D) i.e All of the above