Clasificación de la Biblioteca del CongresoSD1-669.5

activism(53) Africa(68) agriculture(63) American West(65) animals(76) biography(190) biology(145) botany(336) California(186) Canada(133) Canadian(41) climate(22) climate change(91) conservation(288) deforestation(62) disasters(50) ecology(611) ecosystems(28) environment(552) environmental(33) Environmental aspects(10) environmental issues(13) environmental studies(20) environmentalism(112) fire(257) fires(54) forest(181) gardening(107) geography(61) history(770) homesteading(17) horticulture(34) industry(27) informational(60) land use(21) local(19) Michigan(32) Minnesota(25) narrative nonfiction(19) National Parks(36) natural disasters(72) natural resources(27) natural world(12) nature(1,098) nature writing(45) New Mexico(42) North America(35) Northwest(32) outdoors(65) photographs(45) photography(165) picture book(159) pnw(24) politics(61) reference(92) rock(67) rock and roll(23) science(574) sustainability(51) travel(64) tree(44) trees(1,493) usa(135) Washington(33) weather(34) wilderness(50) wildlife(36) wood(119) woods(39)