 In 2007, the European Commission also announced that (to appease British public opinion and to facilitate trade with the United States) it was to abandon the requirement for metric-only labelling on packaged goods, and to allow dual metric–imperial marking to continue indefinitely.The United States, the United Kingdom, and Canada have some active opposition to metrication, particularly where updated weights and measures laws would make obsolete historic systems of measurement.The Roman empire used the "pes" (foot) measure.