Environmentalist Quotes and aphorisms about them John Muir John Muir John Muir John Muir John Muir ,, The more I see of deer, the more I admire them as mountaineers. They make their way into the heart ... John Muir ,, During my first years in the Sierra, I was ever calling on everybody within reach to admire them, b... Aldo Leopold Greta Thunburg Paul Hawken Paul Hawken