http://book.klll.cc/ebooks/subject/17536.opds?sort_order=release_date 2025-09-03T06:52:46Z Books about Nature -- Effect of human beings on (sorted by release date) Free eBooks since 1971. Project Gutenberg https://book.klll.cc webmaster@gutenberg.org https://book.klll.cc/gutenberg/favicon.ico 25 1 2025-09-03T06:52:46Z https://book.klll.cc/ebooks/subject/17536.opds?sort_order=title Sort Alphabetically by Title 2025-09-03T06:52:46Z https://book.klll.cc/ebooks/subject/17536.opds?sort_order=downloads Sort by Popularity 2025-09-03T06:52:46Z https://book.klll.cc/ebooks/37957.opds Man and Nature; Or, Physical Geography as Modified by Human Action George P. Marsh 2025-09-03T06:52:46Z https://book.klll.cc/ebooks/6019.opds The Earth as Modified by Human Action George P. Marsh