20:
480:
497:
439:
456:
547:
172:
167:
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155:
150:
145:
140:
517:
124:
119:
114:
109:
104:
94:
89:
84:
79:
74:
419:
371:
354:
337:
320:
303:
286:
269:
252:
235:
218:
48:
542:
477:
494:
395:
453:
64:
56:
8:
34:
25:
52:
60:
460:
423:
399:
358:
521:
501:
375:
324:
307:
290:
273:
256:
552:
443:
341:
239:
222:
484:
536:
19:
416:
368:
351:
334:
317:
300:
283:
266:
249:
232:
215:
392:
202:
This category has the following 17 subcategories, out of 17 total.
41:
481:
Renewable resource companies disestablished in the 1940s
498:
Renewable resource companies established in the 1940s
15:
69:
534:
440:Protected areas disestablished in the 1940s
457:Protected areas established in the 1940s
535:
197:
13:
204:
196:
14:
564:
18:
548:20th century in the environment
49:human impact on the environment
1:
32:These articles relate to the
518:1940s individual tree deaths
7:
10:
569:
420:1940s natural disasters
372:1949 in the environment
355:1948 in the environment
338:1947 in the environment
321:1946 in the environment
304:1945 in the environment
287:1944 in the environment
270:1943 in the environment
253:1942 in the environment
236:1941 in the environment
219:1940 in the environment
543:Environment by decade
65:environmental issues
35:natural environment
26:Environment portal
396:1940s meteorology
53:environmental law
47:They include the
560:
523:
503:
496:
486:
479:
462:
455:
445:
425:
418:
401:
394:
377:
370:
360:
353:
343:
336:
326:
319:
309:
302:
292:
285:
275:
268:
258:
251:
241:
234:
224:
217:
189:
184:
179:
137:
61:environmentalism
28:
23:
22:
568:
567:
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562:
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328:
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46:
24:
17:
12:
11:
5:
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30:
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9:
6:
4:
3:
2:
565:
554:
551:
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412:
411:
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397:
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347:
339:
335:
330:
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318:
313:
305:
301:
296:
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279:
271:
267:
262:
254:
250:
245:
237:
233:
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220:
216:
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210:
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199:Subcategories
198:
186:
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176:
174:
171:
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66:
62:
58:
54:
50:
44:
43:
37:
36:
27:
21:
16:
201:
160:
99:
57:conservation
39:
33:
31:
461:(11 C, 2 P)
359:(10 C, 8 P)
40:the decade
537:Categories
376:(5 C, 4 P)
342:(8 C, 1 P)
325:(6 C, 4 P)
308:(7 C, 2 P)
291:(7 C, 2 P)
274:(4 C, 3 P)
240:(5 C, 1 P)
223:(7 C, 1 P)
424:(20 C)
400:(13 C)
553:1940s
522:(3 P)
502:(2 C)
485:(1 C)
444:(1 P)
257:(5 C)
125:1990s
120:1980s
115:1970s
110:1960s
105:1950s
100:1940s
95:1930s
90:1920s
85:1910s
80:1900s
75:1890s
42:1940s
188:25th
183:24th
178:23rd
173:22nd
168:21st
162:20th
156:19th
151:18th
146:17th
141:16th
136:15th
63:and
208:0–9
38:in
539::
520:
500:
483:
459:
442:
422:
398:
374:
357:
340:
323:
306:
289:
272:
255:
238:
221:
67:.
59:,
55:,
51:,
511:T
470:R
433:P
409:N
385:M
45:.
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