"The elk are the most abundant large herbivores in the Yellowstone ecosystem. There are thousands and thousands of them. They migrate in and out. And those migration routes need to stay open."

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Lake Baikal in Russia has 25 percent of the freshwater resources of the world. Sixty-five percent of the Russian ecosystems are in danger. So let's preserve what we have, and let's take good care of nature.

— Mikhail Gorbachev