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49:human impact on the environment
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32:These articles relate to the
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243:Species described in 1817
273:1810s in the environment
219:1817 natural disasters
65:environmental issues
268:Environment by year
57:nature conservation
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26:Environment portal
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262:Categories
40:the year
247:(4 C)
223:(1 C)
188:1860s
183:1850s
178:1840s
173:1830s
168:1820s
162:1810s
156:1800s
151:1790s
146:1780s
141:1770s
136:1760s
278:1817
125:1822
120:1821
115:1820
110:1819
105:1818
100:1817
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63:and
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38:in
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