What the public frequently ask about the Prince of Wales Q: As an environmental leader, why does The Prince of Wales drive around in a Bentley and own an Aston Martin? A: The Prince does not own or choose to drive around in a Bentley. The car is required for some engagements for security reasons and is owned by the Metropolitan Police. Normally, The Prince and The Duchess are driven around in a Jaguar XJ diesel, his main official car. He also leases diesel vehicles for use when he is in the countryside. In order to reduce net emissions from car travel, The Prince's Jaguars, Audi and Range Rover have been converted to run on 100 per cent biodiesel made from used cooking oil, and his 40-year-old Aston Martin to run on 100 per cent bioethanol made from waste wine. Q: Does The Prince advocate untested and dangerous alternative medical therapies? The Prince is a keen advocate of integrated health care. This means taking a wider, preventive approach to health care by addressing the underlying social, lifestyle and environmental causes of disease. In this system patients, protected by a sound regulatory environment and the support of the National Health Service, have access not just to conventional medical treatment an proven complementary care and therapy. Q: What is Duchy Originals? Is it anything to do with the Duchy of Cornwall? A: Duchy Originals is a company which The Prince of Wales set up in 1990, principally to sell organic food products. Since then, it has become established as a leading organic and natural food brand. In 2010 the brand went into partnership with Waitrose. From the beginning, it has aimed to help small and medium sized producers, and all profits have gone to charitable causes. It operates entirely separately from the Duchy of Cornwall, which is the private estate from which The Prince of Wales derives his annual income.