Climate change is frightening. Drought causes even death in certain parts of the world, the poorest. The heaviest impacts of global warming, in fact, fall on developing countries, particularly affected by the climate revolution. The real, enormous emergency of our time, of which we still speak too little, while it should be at the top of the agenda of every international summit. The origin also of the tragic increase of migrants, fleeing from poverty aggravated by environmental degradation.