Clasificación de la Biblioteca del CongresoGF13

academic(42) activism(85) agriculture(143) anarchism(72) animal welfare(23) animals(153) anthropology(505) apocalypse(56) archaeology(122) architecture(121) art(172) biology(296) capitalism(64) cities(79) climate(202) climate change(541) collapse(70) conservation(257) cultural history(109) cultural studies(67) culture(272) current events(36) deforestation(21) disasters(46) diy(121) earth(150) eco(51) ecocriticism(21) ecology(2,309) economics(241) ecosystems(42) emergency(51) energy(94) environment(2,660) environmental(205) environmental degradation(31) environmental issues(41) environmental policy(58) environmental studies(127) environmentalism(554) essay(78) ethics(143) evolution(183) extinction(66) food(89) future(130) futurism(32) gardening(251) geography(1,177) geology(74) global warming(121) globalization(66) green(156) handbook(54) health(75) history(1,678) homesteading(214) how-to(188) human ecology(458) human geography(251) human impact(14) humanity(40) humans(23) humor(366) land use(28) landscape architecture(41) natural disasters(25) natural resources(37) natural science(54) nature(1,522) nature writing(50) off the grid(11) organic(33) outdoors(92) pantheism(16) peak oil(59) place(99) planning(36) politics(346) pollution(110) popular science(57) population(74) prehistory(34) primitivism(26) psychology(127) reference(525) religion(121) science(1,837) self-help(92) self-reliance(59) self-sufficiency(160) sense of place(19) simple living(29) simplicity(47) social change(31) social theory(34) society(115) sociology(303) spirituality(189) survival(902) survival skills(67) survivalism(51) sustainability(572) sustainable development(31) sustainable living(71) travel(222) urban(60) urban planning(57) urban studies(27) urbanism(59) usa(127) wilderness(75) world(58)