Question

The figure shows the time-series of atmospheric CO\(_2\) concentration on Earth (graph not-to-scale).
\includegraphics[width=0.5\linewidth]{24.png}
Which one of the factors given is the primary reason for the sudden increase in atmospheric CO\(_2\) concentration after 1950?

• A. Overfishing
• B. An increase in Arctic sea ice melting
• C. An increase in fossil fuel burning
• D. Volcanic eruptions

Hint:

To understand trends in atmospheric CO\(_2\) levels:
1. Fossil fuel burning is the leading contributor to CO\(_2\) emissions since the industrial revolution.
2. Distinguish between causes (e.g., burning fossil fuels) and consequences (e.g., Arctic ice melting) when analyzing environmental changes.
3. Volcanic eruptions and other natural factors contribute minimally to modern CO\(_2\) trends compared to human activities.

Answer 1

The Correct Option is C

Step 1: Understand the CO\(_2\) concentration trend. The graph shows a rapid increase in atmospheric CO\(_2\) levels after 1950, coinciding with the post-industrial revolution era. This period is characterized by an exponential rise in the use of fossil fuels for energy production, transportation, and industrial activities. Step 2: Analyze the options. Option (A): Incorrect. Overfishing affects marine biodiversity and ecosystems but does not contribute significantly to atmospheric CO\(_2\) levels.
Option (B): Incorrect. Arctic sea ice melting is a consequence of global warming rather than a cause of increased CO\(_2\) levels.
Option (C): Correct. Fossil fuel burning releases large amounts of CO\(_2\) into the atmosphere, which is the primary reason for the sudden increase in CO\(_2\) levels post-1950.
Option (D): Incorrect. Volcanic eruptions release CO\(_2\), but their contribution to the observed increase post-1950 is negligible compared to human activities.