Paul McCartney was in Brussels recently to promote his Meat Free Monday campaign. The aim of the campaign is to encourage people to go vegetarian at least once a week, for health reasons and to help cut emissions. Some environmental campaigners have identified meat production as a major source of greenhouse gases. McCartney says that having one designated meat-free day a week is a meaningful change that everyone can make. McCartney’s ‘Meat Free Monday’ concert tour begins shortly in Hamburg, the city where the Beatles began their career.