Question

A natural phenomenon that becomes harmful due to pollution is

• A. Global warming
• B. Ecological balance
• C. Greenhouse effect
• D. Destrification

Answer 1

The correct option is C

Greenhouse effect

Explanation for correct option:

Option C

Greenhouse effect:

• It is defined as the phenomenon in which the earth's atmosphere traps the heat from the sun and prevents it forms escaping it into the outer space thereby leading to an increase in the temperature of the earth's surface.
• The temperature of the earth keeps on increasing causing melting of ice of glaciers which results in flooding of rivers, overflowing of rivers, and flooding of a large portion of land.
• The gases in the earth's atmosphere that collects heat and light from the sun are called greenhouse gases.
• The greenhouse gases are carbon dioxide(${\mathrm{CO}}_2$), methane (${\mathrm{CH}}_4$), and water vapor.

Explanation for incorrect option:

Option A

Global warming:

• Global warming is a gradual increase in the earth’s temperature generally due to the greenhouse effect caused by increased levels of carbon dioxide(${\mathrm{CO}}_2$), CFCs, and other pollutants.

Option B

Ecological balance:

• Ecological balance has been defined as a state of dynamic equilibrium within a community of organisms in which genetic, species, and ecosystem diversity remain relatively stable, subject to gradual changes through natural succession.
• To improve our ecosystem and ecological balance we need to decrease the carbon production sources, and increase the plantation because the tree is basic of the ecosystem.

Option D

Destrification:

• Desertification is the degradation process by which a fertile land changes itself into a desert by losing its flora and fauna.
• This can be caused by drought, deforestation, climate change, human activities, or improper agriculture.
• Desertification is a process of degradation of the land.
• It occurs because of man-made activities and climate change.

Therefore, option C is correct.