Mains Answer Writing - 25 Oct, 2025
GS3
Science & Technology
10 marks
What is cloud seeding? Discuss its potential role in addressing air pollution in cities like Delhi.
Tips for your answer
- Define clearly: Start by briefly explaining what cloud seeding is — a weather modification technique that induces artificial rainfall by dispersing chemicals like silver iodide or sodium chloride into clouds.
- Link to Delhi’s context: Mention how it can help temporarily reduce air pollution by washing away particulate matter and improving air quality, especially during high-AQI episodes.
- Add balance: Conclude with limitations and a way forward — it depends on cloud presence, is costly, and offers short-term relief; long-term pollution control needs emission reduction and sustainable urban planning.
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Explain the working of 3D printing technology. Highlight its key benefits in modern manufacturing.
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GS3
Science & Technology
2 Apr, 2026
“3D printing (additive manufacturing) is emerging as a transformative technology in modern manufacturing.”
Discuss its advantages and examine its potential applications in infrastructure and industry.
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