Environmentalist Quotes and aphorisms about had John Muir John Muir John Muir ,, During my first years in the Sierra, I was ever calling on everybody within reach to admire them, b... Greta Thunburg Paul Hawken ,, Hindered by asthma since I was six weeks old, I had begun experimenting with my diet and discovered... Paul Hawken Luther Burbank William Bartram Bill McKibben Donella Meadows