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Congrats on such a well done documentary. Two further questions were brought to mind for me.

1) What important places in the US missed out on becoming national parks? I was struck by the struggle to create Smokey Mountain National Park and how many thousands were displaced in the process. I know that decades ago, there was an effort to make Lake Tahoe in the Sierra Nevada a national park, but it was too populated and developed for that to get much momentum. What other places?

2) What about re-introduction of other indigenous species back into parks where they had been eliminated? I was struck by the information on how wolves had been eliminated in so many parks, not just Yellowstone (essentially everywhere outside of Alaska). But what about other native species like grizzlies in the Sierra Nevada? Since the 1920s, the only grizzly in California is on the state flag ironically enough.