The Earth’s climate warmed over the last 100 years beyond 1°, although it is not still arrived at 1.1°. Only one grade can be perceived as a small warm, but the repercussions are catastrophic, because of the inertia possessed by the physics mechanisms that are regulating our planet. In order to apply fully the Paris Agreement, we should keep the warm well under 2°, aiming to keep it under 1.5°.