Clasificación de la Biblioteca del CongresoTJ825.W56

activism(5) alternative(8) architecture(71) business(17) cats(6) children(9) children's(12) climate(17) climate change(43) community(10) conservation(25) construction(12) Denmark(34) design(5) diy(24) earth(14) ecology(50) economics(31) energy(526) engineering(59) England(6) environment(178) environmental(15) environmentalism(17) Europe(6) experiments(6) future(6) geography(5) global warming(17) green(33) history(56) homesteading(22) household management(5) how-to(10) humor(5) industry(6) informational(26) invention(7) inventions(5) juvenile literature(7) juvenile non-fiction(6) kids(6) light(27) mills(60) natural resources(6) natural science(8) nature(13) oil(12) photography(5) picture book(50) policy(6) politics(19) popular science(5) reference(41) resources(14) science(343) science and technology(6) science nonfiction(5) self-reliance(8) self-sufficiency(21) sociology(8) sustainability(87) sustainable living(27) urban(5) usa(10) weather(9) wind(74) windmill(5) windmills(95)