The total emission mitigation potential achievable by the year 2030, calculated based on sectoral assessments, is sufficient to reduce global greenhouse gas emissions to half of the current (2019) level or less (robust evidence, high agreement). This potential (32–44 GtCO2-eq) requires implementation of a wide range of mitigation options. Options with mitigation costs lower than USD20 tCO2 –1 make up more than half of this potential and are available for all sectors.