Here are three short draft text options you can use for "wetlands 2013 ok.ru" (pick one or mix parts):

The Ramsar Convention, an international treaty for the conservation and sustainable use of wetlands, plays a key role in their protection. The official Ramsar website is a primary source for information on international efforts, including Russia's participation.

The search for content leads directly to OK.ru itself. While a specific page from 2013 may be elusive, the platform hosts a variety of content related to wetlands.

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