Which statement is NOT true about the greenhouse effect?
a. The greenhouse effect is caused by the presence of greenhouse gases in the atmosphere.
b. The greenhouse effect is a natural process.
c. The greenhouse effect is important for keeping the Earth cool enough to support life.
d. The greenhouse effect is an important part of keeping the Earth warm enough to sustain life.
The correct answer and explanation is :
The statement that is NOT true about the greenhouse effect is:
c. The greenhouse effect is important for keeping the Earth cool enough to support life.
Explanation:
The greenhouse effect is a natural process whereby certain gases in Earth’s atmosphere trap heat, preventing it from escaping into space. This process warms the planet to a temperature capable of sustaining life. Without it, Earth’s average temperature would be around -18°C (0°F) instead of the current 15°C (59°F).
The other statements are true:
- a. The greenhouse effect is caused by the presence of greenhouse gases in the atmosphere. Greenhouse gases such as carbon dioxide (CO₂), methane (CH₄), nitrous oxide (N₂O), and water vapor are responsible for absorbing and emitting infrared radiation, which warms the Earth’s surface.
- b. The greenhouse effect is a natural process. This effect is intrinsic to Earth’s climate system, maintaining temperatures that allow for the existence of diverse life forms.
- d. The greenhouse effect is an important part of keeping the Earth warm enough to sustain life. By retaining heat, the greenhouse effect ensures that Earth’s surface temperature remains within a range suitable for living organisms.
However, human activities such as burning fossil fuels, deforestation, and certain agricultural practices have significantly increased the concentrations of greenhouse gases in the atmosphere. This enhancement of the natural greenhouse effect leads to global warming and associated climatic changes.
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