Clasificación de la Biblioteca del CongresoSD

1970s(29) 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(109) geography(61) history(770) horticulture(34) industry(27) informational(60) jazz(41) land use(21) Michigan(32) Minnesota(25) music(136) narrative nonfiction(19) National Parks(36) natural disasters(72) natural resources(27) 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) pop(34) reference(92) rock(121) rock and roll(35) science(574) sustainability(51) travel(64) tree(44) trees(1,493) usa(138) Washington(33) wilderness(50) wildlife(36) wood(119) woods(39)