One of the hallmarks of a great textbook is its ability to evolve, and "Ecology and Environment" is a prime example. First published in 1975, the book has been through numerous editions, each one thoroughly rewritten, enlarged, and updated to reflect the latest scientific consensus and syllabus requirements. Since at least 1991, it has been released in multiple editions, from the 6th edition to the current 13th edition available in 2024. Each edition has seen a significant increase in page count, from 519 pages to 755 pages, as the author incorporated new research and added chapters on emerging topics. This constant evolution ensures that the book remains relevant for contemporary university coursework and competitive exams like the UPSC Civil Services Examination, where it is a highly recommended resource.
How industrial and agricultural runoff devastate aquatic ecosystems and poison food chains. ecology and environment p.d. sharma pdf drive
| Edition | Year | Key Features | Publisher | | :--- | :--- | :--- | :--- | | 6th Edition | 1991 | Focused more on the fundamentals of ecology | Rastogi Publications | | 2010 Edition | 2010 | Included updated content and extended to 600 pages | Rastogi Publications | | 2012 Edition | 2012 | Covered 643 pages, including new sections on environmental challenges | Rastogi Publications | | 2013 Edition | 2013 | A 643-page edition with 22 chapters, expanding on sustainable development | Rastogi Publications | | 2015 Edition | 2015 | Made available in some digital libraries and had 24 chapters | Rastogi Publications | | 13th Edition | 2020/2021/2024 | The most updated, comprehensive edition, with 755 pages | Rastogi Publications | One of the hallmarks of a great textbook