Human Rights Law and the Obligation to Reduce Greenhouse Gas Emissions

Human rights law has been called upon to help with the problem of persistently high greenhouse gas emissions. An obligation on states and other legal entities to lower their emissions (mitigation) is said to be deducible from that body of law. I refute this thesis. First, I consider two practical difficulties—causality and non-triviality—that face a plaintiff who, with emission mitigation as the objective, attempts to prove a human rights violation using the regular pattern of proof for a violation. Proponents of the “human rights approach” to mitigation have held that proof of an emission “contribution” by the defendant together with proof of an “impact” by climate change on the plaintiff’s human rights are sufficient to discharge the evidentiary burden for the proof of causation. The rest of the causation chain is simply presumed. Thus, the original proof pattern for a human rights violation is abandoned. The proponents’ answer to the triviality difficulty has been to aggregate emitters into very large entities and sue them . However, aggregation can be shown to lead to a reductio ad absurdum . In my argument’s second part, I identify a more fundamental difficulty with the human rights approach to mitigation: The defendant’s emissions do not amount to a norm violation. Everyone contributes emissions without legislative or other prohibition. Treaty law on climate change itself recognizes emitting behaviour as lawful and permits the continuation of state emissions through to at least 2050. A rise in global warming from preindustrial levels to 1.5° Celsius with room for an even greater rise to close to 2° Celsius has been budgeted for by the Paris Agreement on Climate Change. The setting up of a budget affirms the normalized status of within-budget emissions. This universal license to emit denies the human rights approach to mitigation the very conditions of application of human rights law.