Does the QAS insist that clients buying QAS-certified carbon offsets cover all their emissions?

No. The QAS demands accurate calculations but does not require a consumer or organisation to offset the emissions associated with the whole of their business/ lifestyle or for all of a defined activity – it is for the consumer or organisation to decide the scope of emissions that they wish to offset. For example a consumer may decide to offset domestic but not international flights or just one month’s electricity consumption. Organisations must communicate transparently to their stakeholders once the scope is decided.