To climate change deniers, I say: "Who cares about the debate?" Why take a chance on a polluted planet for your children and grandchildren? As the UN report noted, greenhouse gases are naturally produced yet have spiked amid forest loss and the Industrial Age, recorded data shows. Today's most abundant greenhouse gas, carbon dioxide, "is the product of burning fossil fuels." One way or another, humans are involved. Whether we feel powerless by grief or distrust, we can "break the paralysis," as UN Secretary-General António Guterres recently urged nations to help prevent "runaway climate change."