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259:Protected areas established in 1873
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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 1873
313:1870s in the environment
239:1873 natural disasters
65:environmental issues
308:Environment by year
57:nature conservation
35:natural environment
26:Environment portal
53:environmental law
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302:Categories
287:(5 C, 1 P)
243:(1 C, 1 P)
40:the year
263:(4 P)
219:(1 P)
188:1920s
183:1910s
178:1900s
173:1890s
168:1880s
162:1870s
156:1860s
151:1850s
146:1840s
141:1830s
136:1820s
318:1873
125:1878
120:1877
115:1876
110:1875
105:1874
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63:and
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38:in
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252:P
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