Category:20th century in the environment

Subcategories

This category has the following 19 subcategories, out of 19 total.

0–9

N

20th-century natural events‎ (2 C)
20th-century naturalists‎ (2 C, 203 P)
Non-renewable resource companies disestablished in the 20th century‎ (56 C)
Non-renewable resource companies established in the 20th century‎ (98 C)

P

Protected areas disestablished in the 20th century‎ (9 C)
Protected areas established in the 20th century‎ (11 C, 1 P)

R

S

Species described in the 20th century‎ (105 C)

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