All the buses of Delhi were converted to run on CNG by the end of 2002

Answer

**Step-by-Step Solution:**

1. **Understanding the Context**: The question states that all buses in Delhi were converted to run on CNG by the end of 2002. To determine if this statement is correct, we need to understand the air pollution situation in Delhi and the measures taken to address it.

2. **Air Pollution in Delhi**: Delhi has been known for its high levels of air pollution, ranking among the most polluted cities globally. The increase in the number of vehicles, particularly cars, has contributed significantly to this problem.

3. **Legal Action**: Due to the severe air pollution levels, a public interest litigation (PIL) was filed in the Supreme Court of India. The court recognized the urgent need to address the air quality issues in Delhi.

4. **Supreme Court Directives**: The Supreme Court mandated the government to take immediate action to reduce pollution levels. One of the major directives was to convert the entire fleet of public transport, specifically buses, to a cleaner fuel.

5. **Conversion to CNG**: The government responded to the Supreme Court’s directives by converting all buses from diesel to CNG (Compressed Natural Gas). This conversion was aimed at reducing emissions and improving air quality.

6. **Completion of Conversion**: By the end of 2002, the conversion of all buses in Delhi to CNG was completed. This step was significant in the efforts to combat air pollution in the city.

7. **Conclusion**: Based on the above points, the statement that all buses of Delhi were converted to run on CNG by the end of 2002 is indeed correct.

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