Select the correct statement out of the following.

Options

A. Electrostatic precipitators (ESPs) can remove over 99 % particulate matter present in the exhaust from a thermal power plant.
B. Over half of the e-wastes generated in developed countries are exported to developing countries, mainluy to China, India and Pakistan, where metals like Cu, Fe, Si Ni, etc., are recovered during recycling process.
C. Use of nuclear energy has two very serious inherent problems first is accidental leakage and the second is safe disposal of radioactive wastes.
D. All of these.

Answer

To solve the question of selecting the correct statement regarding environmental issues, we will analyze each of the provided statements step by step.

### Step-by-Step Solution:

1. **Statement 1: Electrostatic precipitators (ESPs) can remove over 99% particulate matter present in the exhaust from a thermal power plant.**
- **Analysis:** Electrostatic precipitators are devices used to control air pollution by removing particulate matter from exhaust gases. They are indeed capable of removing over 99% of the particulate matter, making this statement true.

2. **Statement 2: Over half of the e-wastes generated in developed countries are exported to developing countries mainly to China, India, and Pakistan where metals like copper, iron, silicon, and nickel are removed during the recycling process.**
- **Analysis:** It is a well-known fact that developed countries often export their electronic waste (e-waste) to developing countries. In these countries, laborers manually extract valuable metals such as copper, iron, silicon, and nickel from the e-waste. This statement is also true.

3. **Statement 3: The use of nuclear energy has two very serious problems: accidental leakage and safe disposal of radioactive wastes.**
- **Analysis:** Nuclear energy production does pose significant risks, including the potential for accidental leaks of radioactive materials, which can have catastrophic consequences. Additionally, the disposal of radioactive waste is a major concern, as it requires safe and secure methods to prevent environmental contamination. This statement is true as well.

4. **Statement 4: All of these.**
- **Analysis:** Since statements 1, 2, and 3 have all been verified as true, statement 4, which claims that all previous statements are correct, is also true.

### Conclusion:
The correct answer is **Option 4: All of these.**

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