Playlist · Drishti IAS
Environment and Ecology – 100 Most Important Topics for Prelims 2026
Total watch time
2h 26m
at 1× speed · exactly 2 hours, 26 minutes, 18 seconds at 1×
At an hour a day you'd finish in 3 days
The shape of the course
Each column is one video, to scale
WatchedTo watch
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About 3 days at an hour a day
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At one hour a day, every day, this playlist takes about 3 days. Turn on JavaScript to plan around your week.
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Videos (4)
2h 26m in total · tick what you've watched
Tick videos you've watched — progress is saved in this browser. Titles open on YouTube in a new tab.
| Watched | Leave out of the total | ||||
|---|---|---|---|---|---|
| 1 | Ecological Succession for UPSC Prelims 2026 | Environment & Ecology | Drishti IAS | 48:55 | 2026-05-19 | ||
| 2 | Bioaccumulation & Biomagnification Explained for UPSC 2026 | Environment & Ecology | Drishti IAS | 37:22 | 2026-05-05 | ||
| 3 | Environment & Ecology | Ecotone, Niche & Habitat | UPSC Prelims 2026 | Episode 2 | Drishti IAS | 36:33 | 2026-03-24 | ||
| 4 | Environment and Ecology | Ecosystem | UPSC Prelims 2026 | Episode 1 | Drishti IAS | 23:28 | 2026-03-13 |
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[](https://playlistduration.com/playlist/PLNdRsMqHda59Rh1PBthSLJdkPsyq11XUz)<a href="https://playlistduration.com/playlist/PLNdRsMqHda59Rh1PBthSLJdkPsyq11XUz"><img src="https://playlistduration.com/badge/playlist/PLNdRsMqHda59Rh1PBthSLJdkPsyq11XUz.svg" alt="Watch time: 2h 26m · 4 videos" width="196" height="20"></a>Add ?speed=1.5 to the image URL for the time at that speed, ?label=Course to change the left text, or ?style=flat-square for square corners.
Want the numbers themselves? GET https://playlistduration.com/api/v1/playlist/PLNdRsMqHda59Rh1PBthSLJdkPsyq11XUz returns them as JSON — free, no key. API docs →
Data from the YouTube Data API as of 2026-11-01 (cached). Private or deleted videos are excluded from totals.