How did UK cigarette makers reduce tar to 10 mg or less?

NA=CO yields were not available in LGC report.5 Our findings indicate that manufacturers complied with the EC's recent mandated yield reduction primarily by increasing filter ventilation rates on cigarettes-a design feature that promotes compensatory smoking. 2 The current "10-1-10" standard is therefore unlikely to reduce smoke exposure for smokers. 3 The EC, while recognising the compensation problem, has said that it will not revise the standard until solid evidence shows that better methods exist. 1 Our data suggest that removing erroneous yields from packs and adopting alternative approaches to reducing the harmfulness of cigarettes, such as banning filter vents, seems warranted.