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This category has the following 4 subcategories, out of 4 total.
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259:Protected areas established in 1837
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49:human impact on the environment
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32:These articles relate to the
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283:Species described in 1837
313:1830s in the environment
239:1837 natural disasters
65:environmental issues
308:Environment by year
57:nature conservation
35:natural environment
26:Environment portal
53:environmental law
47:They include the
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61:environmentalism
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302:Categories
243:(2 C, 1 P)
40:the year
287:(3 C)
263:(1 P)
219:(1 P)
188:1880s
183:1870s
178:1860s
173:1850s
168:1840s
162:1830s
156:1820s
151:1810s
146:1800s
141:1790s
136:1780s
318:1837
125:1842
120:1841
115:1840
110:1839
105:1838
100:1837
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63:and
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38:in
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252:P
228:N
208:M
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