Abstract
The Earth is increasingly hostile towards many living species and uninhabitable in some parts of the world. What is foretold in the coming decades is not the end of the world, but the end of the world as we know it. All over the world, many individuals (scientists, intellectuals, citizens) today believe in the inevitability of a collapse of our civilization and their existence is profoundly disrupted: can they still plan to start a family? Should they continue their studies, or should they start preparing for survival today? Does existence still have any meaning? In clinical ethics consultations, we are confronted with requests for definitive contraception for environmental reasons that put the medical profession and the very foundations of clinical ethics in difficulty. What answers are legitimate?