Quotes and aphorisms about ecosystems Gary Larson ,, Humans have changed ecosystems more rapidly and extensively than in any comparable period of time i... Edward Norton Winona LaDuke Johan Rockstrom Greta Thunburg ,, The climate crisis is both the easiest and the hardest issue we have ever faced. The easiest becaus... Greg Walden Christopher Monckton David Suzuki Hendrik Poinar Gloria Reuben