Question

Identify the signs of global warming and climate change:
A. The land ice sheets in Antarctica and Greenland are increasing mass.
B. Arctic Sea ice is declining at a rate of 11.5% per decade.
C. There is more carbon dioxide in the atmosphere today than at any point in the last 8 lakh years.
D. Since 1870, global sea levels have reduced by about 8 inches. Choose the correct answer from the options given below:

• A. A and B Only
• B. A and D Only
• C. B and C Only
• D. C and D Only

Hint:

Rising carbon dioxide and melting Arctic ice are major signs of climate change.

Answer 1

The Correct Option is C

Concept:
Global warming and climate change produce measurable environmental changes across the Earth.

Step 1:
Ice sheets in Antarctica and Greenland are generally losing mass due to rising global temperatures. \[ A \text{ is incorrect} \]

Step 2:
Arctic sea ice has been declining rapidly over recent decades. \[ B \text{ is correct} \]

Step 3:
Atmospheric carbon dioxide concentration today is extremely high compared to the past several lakh years. \[ C \text{ is correct} \]

Step 4:
Global sea levels have risen, not reduced, since the late nineteenth century. \[ D \text{ is incorrect} \]

Step 5:
Thus, the correct statements are: \[ B \text{ and } C \text{ Only} \] \[ \boxed{\text{(3) B and C Only}} \]