Low-emissions hydrogen is a broad category for hydrogen with a comparatively small greenhouse gas footprint. It can be produced using low-carbon electricity, or from fossil fuels combined with carbon capture and other emissions controls. It is a performance description rather than one fixed production method.
Whether a project qualifies depends on the measurement rules. Standards can count emissions from electricity, fuel extraction, processing, transport and other lifecycle stages, and can impose different maximum thresholds. Nuclear-powered electrolysis may fit a low-emissions category without meeting a renewable-only definition.
Carbon capture does not make fossil-based hydrogen automatically low-emissions. Capture performance, methane emissions upstream and energy used by the plant are relevant. Similarly, electrolysis powered by a high-emissions grid may have a larger footprint than its technology label suggests.
For market reports, identify the certification scheme or numerical emissions threshold being used. Compare production pathways on a consistent lifecycle basis and distinguish proposed low-emissions capacity from independently verified output.