http://book.klll.cc/ebooks/subject/17536.opds?sort_order=title 2025-08-15T18:18:59Z Books about Nature -- Effect of human beings on (sorted alphabetically) Free eBooks since 1971. Project Gutenberg https://book.klll.cc webmaster@gutenberg.org https://book.klll.cc/gutenberg/favicon.ico 25 1 2025-08-15T18:18:59Z https://book.klll.cc/ebooks/subject/17536.opds?sort_order=release_date Sort by Release Date 2025-08-15T18:18:59Z https://book.klll.cc/ebooks/subject/17536.opds?sort_order=downloads Sort by Popularity 2025-08-15T18:18:59Z https://book.klll.cc/ebooks/6019.opds Earth as Modified by Human Action George P. Marsh 2025-08-15T18:18:59Z https://book.klll.cc/ebooks/37957.opds Man and Nature; Or, Physical Geography as Modified by Human Action George P. Marsh