The increase in climatic incidents is raising awareness that the accumulation of greenhouse gases in the atmosphere is the cause. It is then the responsibility of States to conduct policies aimed at reducing them. But a consensus is difficult to reach because the phenomenon is global and there is no link between a country's action and the benefits it will be able to derive from it. It is the accumulation over the years that is the cause. Emerging countries, because of their growth, generate more and more emissions, but they can legitimately claim that they are much less responsible ...