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49:human impact on the environment
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32:These articles relate to the
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263:Species described in 1831
293:1830s in the environment
239:1831 natural disasters
65:environmental issues
288:Environment by year
57:nature conservation
35:natural environment
26:Environment portal
53:environmental law
47:They include the
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282:Categories
40:the year
267:(4 C)
243:(1 C)
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
298:1831
125:1836
120:1835
115:1834
110:1833
105:1832
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63:and
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38:in
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228:N
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