Clasificación de la Biblioteca del CongresoSD421.3

21st century(7) activism(10) adventure(26) Africa(34) agriculture(18) American(13) American literature(6) American West(43) animals(20) anthropology(11) Australian(5) autobiography(16) biography(74) biology(35) botany(20) California(37) Canada(34) Canadian(6) Canadian author(9) children(8) children's(6) climate(15) climate change(58) conservation(97) corporations(6) cultural history(7) culture(5) current events(6) deforestation(36) development(12) disasters(50) early reader(6) earth(13) ecology(182) economics(10) ecosystems(7) educational(6) environment(193) Environmental aspects(8) environmental issues(7) environmentalism(29) essay(6) fire(247) fires(53) forest(41) geography(21) guidebook(6) hiking(8) history(336) industry(9) informational(26) journalism(8) juvenile(9) kids(7) land use(5) Latin America(14) literary nonfiction(7) literature(5) local(16) maps(5) Michigan(5) Minnesota(11) narrative nonfiction(8) National Parks(28) natural disasters(71) natural resources(6) natural science(5) nature(290) nature writing(16) New Mexico(29) New York(7) North America(5) Northwest(9) outdoors(27) photographs(20) photography(23) picture book(23) pnw(14) politics(26) reference(11) science(229) science nonfiction(6) social justice(6) sociology(5) solitude(14) South America(12) Southwest(10) survival(14) sustainability(13) travel(27) trees(123) us(8) usa(55) Washington(16) weather(33) wilderness(32) wildlife(14) women(9) wood(5) Wyoming(12)