Question

Increased $C{O}_2$ concentration in the atmosphere leads to

• A. Global warming
• B. Eutrophication of lakes
• C. Depletion of the ozone layer
• D. Magnification in the food chain
• E. Acid rain

Answer 1

Answer: (A)

Global warming

Global warming is caused by increased atmospheric concentration of $C{O}_2$ and other green house gases. As greenhouse gases absorbs the solar energy when radiation is reflected back to the atmosphere from earth's surface and increase the earth's temperature. Eutrophication refers to the presence of excess organic compounds in water. Depletion of the ozone layer is caused by the excess release of chlorine and bromine-containing the chemical in the atmosphere. Acid rain is the result of increased sulphur and nitrogen oxide levels in the atmosphere. Slow metabolism and excretion of pesticides causes their accumulation in fat tissues of organisms and is referred to as biomagnifications. The correct answer is A.