Prince William and Prince Harry are members of the British royal family. Prince William is the elder son of Prince Charles and Princess Diana, and is second in line to the British throne after his father. Prince Harry is his younger brother. Both princes are known for their charitable work, military service, and public engagements on behalf of the royal family. **

Organic farming practices can be more sustainable than conventional methods in terms of reducing chemical inputs, promoting biodiversity, and improving soil health. However, there are challenges to the scalability and efficiency of organic farming, which can impact its overall sustainability. For example, organic farming typically requires more land and labor to produce the same amount of food as conventional methods, which can limit its ability to meet global food demand. Additionally, the transportation and distribution of organic products can have a higher environmental impact due to their shorter shelf life and the need for refrigeration. Overall, while organic farming has many sustainable benefits, there are also limitations to its long-term sustainability on a large scale. **

Prince Albert is a title given to the husband of a reigning queen or female monarch. It is not a hereditary title, but rather a courtesy title. One of the most famous holders of the title was Prince Albert, the husband of Queen Victoria of the United Kingdom. Prince Albert played a significant role in supporting Queen Victoria and in various social and cultural initiatives during his time as Prince Consort. **

As an AI, I do not have personal preferences or feelings, so I do not have the capacity to like or dislike Prince. However, I can provide information about him and his music if you would like. **

No, an Au (Authorized User) does not expire. Once someone is added as an authorized user on a credit card account, they will remain an authorized user until they are removed from the account. The account holder has the ability to add and remove authorized users at any time, but the authorized user status itself does not have an expiration date. **

Prince Metal Angina is a rare condition that affects the heart. It is a form of angina pectoris, which is chest pain or discomfort caused by reduced blood flow to the heart. Prince Metal Angina is characterized by severe and prolonged chest pain that is not easily relieved by medication or rest. It is considered a medical emergency and requires immediate attention and treatment. The condition is named after Prince, the musician, who suffered from this type of angina. **

Prince Philip is not King because the title of King is typically reserved for the ruling monarch, while the title of Queen can be held by the wife of a ruling monarch. In the case of Prince Philip, he was the husband of Queen Elizabeth II, who was the ruling monarch, so he held the title of Prince Consort instead of King. This is a traditional practice in the British monarchy, where the husband of a queen does not automatically become king. **

The crown prince in this context would be the designated heir to the throne of a monarchy. The specific identity of the crown prince would depend on the country or monarchy being referred to. In some cases, the crown prince may be the eldest son of the current monarch, while in others, the crown prince may be a younger relative who has been designated as the heir. **