Environmentalist Quotes and aphorisms about climate John Muir Greta Thunburg Greta Thunburg Greta Thunburg Greta Thunburg Greta Thunburg ,, The climate crisis is both the easiest and the hardest issue we have ever faced. The easiest becaus... Greta Thunburg Greta Thunburg Greta Thunburg Greta Thunburg