Greenhouse effect is

Options

A. Gardening outside the house
B. Global cooling
C. Global warming
D. Green color house

Answer

**Step-by-Step Text Solution:**

1. **Understanding the Greenhouse Effect**: The greenhouse effect is a natural process that warms the Earth’s surface. When the Sun's energy reaches the Earth, some of it is reflected back to space and the rest is absorbed, warming the planet.

2. **Role of Greenhouse Gases**: Certain gases in the Earth's atmosphere, known as greenhouse gases (like carbon dioxide, methane, and water vapor), trap some of the outgoing energy. This trapping of heat is what keeps the Earth warm enough to sustain life.

3. **Temperature Without Atmosphere**: If the Earth had no atmosphere, the average temperature would be around -18 degrees Celsius, making it inhospitable for life.

4. **Temperature With Atmosphere**: With the presence of the atmosphere and the greenhouse effect, the average temperature of the Earth is about 15 degrees Celsius, which is conducive to life.

5. **Impact of Increased Greenhouse Gases**: If the concentration of greenhouse gases increases, more heat is trapped, leading to an increase in the average temperature of the Earth. This phenomenon is known as global warming.

6. **Identifying the Correct Answer**: Given the options:
- A) Gardening outside the house - Incorrect
- B) Global cooling - Incorrect
- C) Global warming - Correct
- D) The green color houses - Incorrect

The correct answer to the question "Greenhouse effect is" is **C) Global warming**.

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