Question

The major factor in causing global warming is

• A. Increase in oxygen concentration in atmosphere
• B. Decrease in carbon dioxide concentration in atmosphere
• C. Increase in carbon dioxide concentration in atmosphere
• D. Decrease in atmospheric nitrogen

Answer 1

The correct option is C

Increase in carbon dioxide concentration in atmosphere

The correct option is C

The explanation for the correct option:

1. Carbon dioxide is the primary contributor to human-caused global warming and climate change.
2. Carbon dioxide is a long-lived gas, which implies it accumulates in the atmosphere as a result of continued human emissions and lingers there for centuries.
3. The temperature of the Earth is determined by a balance between incoming solar energy and energy reflected back into space.
4. The heat that otherwise would have been lost to space is absorbed by carbon dioxide.
5. Some of this energy is re-emitted, leading the globe to become even hotter.

The major factor in causing global warming is increase in carbon dioxide concentration in atmosphere.