If there is anything positive to be said about Donald Trump withdrawing from the Paris climate agreement, it is this: Americans of all political stripes have announced that they will not abdicate their responsibility on climate change. When you see former climate change deniers like former Texas Governor (and now Energy Secretary) Rick Perry and former Exxon CEO (and now Secretary of State) Rex Tillerson accept that climate change is real and caused by human activity, it is a unequivocal sign that the message is getting through. When you see the CEOs of some of the largest and most conservative corporations in America like General Electric, Dow Chemical, Exxon Mobil, and Goldman Sachs express their disappointment in the U.S. leaving the climate accords, there is very good reason to be optimistic about the future.