This chapter looks at how net-zero emission targets have emerged from the scientific understanding of the climate system and the goals of the Paris Agreement (section 3.2). It sets out the considerations in translating net-zero from a global scientific concept to national policy targets (section 3.3), and assesses current targets in terms of their ambition, scope, transparency and consistency with near-term plans and actions (sections 3.4 and 3.5).
The full Emissions Gap Report 2021 can be read here.