Environmentalist Quotes and aphorisms about will John Muir John Muir John Muir ,, No traveler, whether a tree lover or not, will ever forget his first walk in a sugar-pine forest. T... Greta Thunburg Paul Hawken Paul Hawken Paul Hawken Paul Hawken Paul Hawken ,, We need to revise our economic thinking to give full value to our natural resources. This revised e... William Bartram