
Carbon neutrality is defined by an internationally valid standard (PAS 2060) that specifies requirements for the measurement, reduction, and offsetting of greenhouse gases. This set of rules was first published by the British Standards Institution in 2010. It defines a carbon-neutral footprint as a state in which an activity (e.g. production, flight, etc.) has no impact on the global CO₂ emissions into the atmosphere. The standard specifies a certain period of time to be considered for this status.