LC ClassificationGF

academic(41) activism(81) agriculture(125) anarchism(66) animal welfare(23) animals(139) anthropology(478) apocalypse(53) archaeology(104) architecture(116) art(163) biology(284) biophilia(7) capitalism(58) cities(79) climate(187) climate change(510) collapse(36) conservation(236) cultural history(104) cultural studies(64) culture(258) deforestation(22) disasters(46) diy(108) earth(135) eco(43) ecocriticism(22) ecology(2,179) economics(229) economy(35) ecosystems(35) emergency(51) energy(89) environment(2,544) environmental(197) environmental degradation(33) environmental issues(39) environmental policy(57) environmental studies(127) environmentalism(533) essay(75) ethics(140) evolution(174) extinction(63) food(79) future(124) futurism(31) gardening(214) geography(1,126) geology(66) global warming(117) globalization(63) green(154) handbook(52) health(82) history(1,567) homesteading(185) how-to(181) human ecology(430) human geography(248) human impact(13) humanity(38) humans(21) humor(364) land use(30) landscape architecture(40) natural disasters(25) natural resources(36) natural science(48) nature(1,419) nature writing(48) organic(28) outdoors(96) pantheism(15) peak oil(58) place(97) planning(35) policy(26) political ecology(9) politics(326) pollution(99) popular science(55) population(69) prehistory(33) primitivism(26) psychology(120) reference(489) religion(112) science(1,767) self-help(77) self-reliance(54) self-sufficiency(137) sense of place(19) simple living(24) simplicity(42) social change(29) social theory(33) society(110) sociology(291) spirituality(187) survival(866) survival skills(66) survivalism(43) sustainability(536) sustainable development(30) sustainable living(58) travel(199) urban(60) urban planning(56) urban studies(28) urbanism(62) usa(120) wilderness(72) world(54)